diff --git a/crates/index-scheduler/src/scheduler/process_dump_creation.rs b/crates/index-scheduler/src/scheduler/process_dump_creation.rs
index b8d100415..b14f23d0b 100644
--- a/crates/index-scheduler/src/scheduler/process_dump_creation.rs
+++ b/crates/index-scheduler/src/scheduler/process_dump_creation.rs
@@ -5,6 +5,7 @@ use std::sync::atomic::Ordering;
 
 use dump::IndexMetadata;
 use meilisearch_types::milli::constants::RESERVED_VECTORS_FIELD_NAME;
+use meilisearch_types::milli::index::EmbeddingsWithMetadata;
 use meilisearch_types::milli::progress::{Progress, VariableNameStep};
 use meilisearch_types::milli::vector::parsed_vectors::{ExplicitVectors, VectorOrArrayOfVectors};
 use meilisearch_types::milli::{self};
@@ -227,12 +228,21 @@ impl IndexScheduler {
                         return Err(Error::from_milli(user_err, Some(uid.to_string())));
                     };
 
-                    for (embedder_name, (embeddings, regenerate)) in embeddings {
+                    for (
+                        embedder_name,
+                        EmbeddingsWithMetadata { embeddings, regenerate, has_fragments },
+                    ) in embeddings
+                    {
                         let embeddings = ExplicitVectors {
                             embeddings: Some(VectorOrArrayOfVectors::from_array_of_vectors(
                                 embeddings,
                             )),
-                            regenerate,
+                            regenerate: regenerate &&
+                            // Meilisearch does not handle well dumps with fragments, because as the fragments
+                            // are marked as user-provided,
+                            // all embeddings would be regenerated on any settings change or document update.
+                            // To prevent this, we mark embeddings has non regenerate in this case.
+                            !has_fragments,
                         };
                         vectors.insert(embedder_name, serde_json::to_value(embeddings).unwrap());
                     }
diff --git a/crates/index-scheduler/src/scheduler/process_export.rs b/crates/index-scheduler/src/scheduler/process_export.rs
index a951a7ca6..0cd06f2e4 100644
--- a/crates/index-scheduler/src/scheduler/process_export.rs
+++ b/crates/index-scheduler/src/scheduler/process_export.rs
@@ -9,6 +9,7 @@ use flate2::write::GzEncoder;
 use flate2::Compression;
 use meilisearch_types::index_uid_pattern::IndexUidPattern;
 use meilisearch_types::milli::constants::RESERVED_VECTORS_FIELD_NAME;
+use meilisearch_types::milli::index::EmbeddingsWithMetadata;
 use meilisearch_types::milli::progress::{Progress, VariableNameStep};
 use meilisearch_types::milli::update::{request_threads, Setting};
 use meilisearch_types::milli::vector::parsed_vectors::{ExplicitVectors, VectorOrArrayOfVectors};
@@ -229,12 +230,21 @@ impl IndexScheduler {
                                 ));
                             };
 
-                            for (embedder_name, (embeddings, regenerate)) in embeddings {
+                            for (
+                                embedder_name,
+                                EmbeddingsWithMetadata { embeddings, regenerate, has_fragments },
+                            ) in embeddings
+                            {
                                 let embeddings = ExplicitVectors {
                                     embeddings: Some(
                                         VectorOrArrayOfVectors::from_array_of_vectors(embeddings),
                                     ),
-                                    regenerate,
+                                    regenerate: regenerate &&
+                                    // Meilisearch does not handle well dumps with fragments, because as the fragments
+                                    // are marked as user-provided,
+                                    // all embeddings would be regenerated on any settings change or document update.
+                                    // To prevent this, we mark embeddings has non regenerate in this case.
+                                    !has_fragments,
                                 };
                                 vectors.insert(
                                     embedder_name,
diff --git a/crates/index-scheduler/src/scheduler/test_embedders.rs b/crates/index-scheduler/src/scheduler/test_embedders.rs
index a9b920bd2..791fed4d8 100644
--- a/crates/index-scheduler/src/scheduler/test_embedders.rs
+++ b/crates/index-scheduler/src/scheduler/test_embedders.rs
@@ -3,6 +3,7 @@ use std::collections::BTreeMap;
 use big_s::S;
 use insta::assert_json_snapshot;
 use meili_snap::{json_string, snapshot};
+use meilisearch_types::milli::index::EmbeddingsWithMetadata;
 use meilisearch_types::milli::update::Setting;
 use meilisearch_types::milli::vector::settings::EmbeddingSettings;
 use meilisearch_types::milli::vector::SearchQuery;
@@ -220,8 +221,8 @@ fn import_vectors() {
 
         let embeddings = index.embeddings(&rtxn, 0).unwrap();
 
-        assert_json_snapshot!(embeddings[&simple_hf_name].0[0] == lab_embed, @"true");
-        assert_json_snapshot!(embeddings[&fakerest_name].0[0] == beagle_embed, @"true");
+        assert_json_snapshot!(embeddings[&simple_hf_name].embeddings[0] == lab_embed, @"true");
+        assert_json_snapshot!(embeddings[&fakerest_name].embeddings[0] == beagle_embed, @"true");
 
         let doc = index.documents(&rtxn, std::iter::once(0)).unwrap()[0].1;
         let fields_ids_map = index.fields_ids_map(&rtxn).unwrap();
@@ -311,9 +312,9 @@ fn import_vectors() {
             let embeddings = index.embeddings(&rtxn, 0).unwrap();
 
             // automatically changed to patou because set to regenerate
-            assert_json_snapshot!(embeddings[&simple_hf_name].0[0] == patou_embed, @"true");
+            assert_json_snapshot!(embeddings[&simple_hf_name].embeddings[0] == patou_embed, @"true");
             // remained beagle
-            assert_json_snapshot!(embeddings[&fakerest_name].0[0] == beagle_embed, @"true");
+            assert_json_snapshot!(embeddings[&fakerest_name].embeddings[0] == beagle_embed, @"true");
 
             let doc = index.documents(&rtxn, std::iter::once(0)).unwrap()[0].1;
             let fields_ids_map = index.fields_ids_map(&rtxn).unwrap();
@@ -497,13 +498,13 @@ fn import_vectors_first_and_embedder_later() {
 
     let docid = index.external_documents_ids.get(&rtxn, "0").unwrap().unwrap();
     let embeddings = index.embeddings(&rtxn, docid).unwrap();
-    let (embedding, _) = &embeddings["my_doggo_embedder"];
-    assert!(!embedding.is_empty(), "{embedding:?}");
+    let EmbeddingsWithMetadata { embeddings, .. } = &embeddings["my_doggo_embedder"];
+    assert!(!embeddings.is_empty(), "{embeddings:?}");
 
     // the document with the id 3 should keep its original embedding
     let docid = index.external_documents_ids.get(&rtxn, "3").unwrap().unwrap();
     let embeddings = index.embeddings(&rtxn, docid).unwrap();
-    let (embeddings, _) = &embeddings["my_doggo_embedder"];
+    let EmbeddingsWithMetadata { embeddings, .. } = &embeddings["my_doggo_embedder"];
 
     snapshot!(embeddings.len(), @"1");
     assert!(embeddings[0].iter().all(|i| *i == 3.0), "{:?}", embeddings[0]);
@@ -558,7 +559,7 @@ fn import_vectors_first_and_embedder_later() {
         "###);
 
     let embeddings = index.embeddings(&rtxn, docid).unwrap();
-    let (embedding, _) = &embeddings["my_doggo_embedder"];
+    let EmbeddingsWithMetadata { embeddings: embedding, .. } = &embeddings["my_doggo_embedder"];
 
     assert!(!embedding.is_empty());
     assert!(!embedding[0].iter().all(|i| *i == 3.0), "{:?}", embedding[0]);
@@ -566,7 +567,7 @@ fn import_vectors_first_and_embedder_later() {
     // the document with the id 4 should generate an embedding
     let docid = index.external_documents_ids.get(&rtxn, "4").unwrap().unwrap();
     let embeddings = index.embeddings(&rtxn, docid).unwrap();
-    let (embedding, _) = &embeddings["my_doggo_embedder"];
+    let EmbeddingsWithMetadata { embeddings: embedding, .. } = &embeddings["my_doggo_embedder"];
 
     assert!(!embedding.is_empty());
 }
@@ -696,7 +697,7 @@ fn delete_document_containing_vector() {
     "###);
     let docid = index.external_documents_ids.get(&rtxn, "0").unwrap().unwrap();
     let embeddings = index.embeddings(&rtxn, docid).unwrap();
-    let (embedding, _) = &embeddings["manual"];
+    let EmbeddingsWithMetadata { embeddings: embedding, .. } = &embeddings["manual"];
     assert!(!embedding.is_empty(), "{embedding:?}");
 
     index_scheduler
diff --git a/crates/meilisearch/db.snapshot b/crates/meilisearch/db.snapshot
deleted file mode 100644
index 29377ce42..000000000
Binary files a/crates/meilisearch/db.snapshot and /dev/null differ
diff --git a/crates/meilisearch/src/routes/indexes/documents.rs b/crates/meilisearch/src/routes/indexes/documents.rs
index 947cd153f..138f5140f 100644
--- a/crates/meilisearch/src/routes/indexes/documents.rs
+++ b/crates/meilisearch/src/routes/indexes/documents.rs
@@ -19,6 +19,7 @@ use meilisearch_types::error::{Code, ResponseError};
 use meilisearch_types::heed::RoTxn;
 use meilisearch_types::index_uid::IndexUid;
 use meilisearch_types::milli::documents::sort::recursive_sort;
+use meilisearch_types::milli::index::EmbeddingsWithMetadata;
 use meilisearch_types::milli::update::IndexDocumentsMethod;
 use meilisearch_types::milli::vector::parsed_vectors::ExplicitVectors;
 use meilisearch_types::milli::{AscDesc, DocumentId};
@@ -1460,9 +1461,13 @@ fn some_documents<'a, 't: 'a>(
                         Some(Value::Object(map)) => map,
                         _ => Default::default(),
                     };
-                    for (name, (vector, regenerate)) in index.embeddings(rtxn, key)? {
+                    for (
+                        name,
+                        EmbeddingsWithMetadata { embeddings, regenerate, has_fragments: _ },
+                    ) in index.embeddings(rtxn, key)?
+                    {
                         let embeddings =
-                            ExplicitVectors { embeddings: Some(vector.into()), regenerate };
+                            ExplicitVectors { embeddings: Some(embeddings.into()), regenerate };
                         vectors.insert(
                             name,
                             serde_json::to_value(embeddings).map_err(MeilisearchHttpError::from)?,
diff --git a/crates/meilisearch/src/search/mod.rs b/crates/meilisearch/src/search/mod.rs
index 93efad67f..82096e7b4 100644
--- a/crates/meilisearch/src/search/mod.rs
+++ b/crates/meilisearch/src/search/mod.rs
@@ -16,7 +16,7 @@ use meilisearch_types::error::{Code, ResponseError};
 use meilisearch_types::heed::RoTxn;
 use meilisearch_types::index_uid::IndexUid;
 use meilisearch_types::locales::Locale;
-use meilisearch_types::milli::index::{self, SearchParameters};
+use meilisearch_types::milli::index::{self, EmbeddingsWithMetadata, SearchParameters};
 use meilisearch_types::milli::score_details::{ScoreDetails, ScoringStrategy};
 use meilisearch_types::milli::vector::parsed_vectors::ExplicitVectors;
 use meilisearch_types::milli::vector::Embedder;
@@ -1528,8 +1528,11 @@ impl<'a> HitMaker<'a> {
                 Some(Value::Object(map)) => map,
                 _ => Default::default(),
             };
-            for (name, (vector, regenerate)) in self.index.embeddings(self.rtxn, id)? {
-                let embeddings = ExplicitVectors { embeddings: Some(vector.into()), regenerate };
+            for (name, EmbeddingsWithMetadata { embeddings, regenerate, has_fragments: _ }) in
+                self.index.embeddings(self.rtxn, id)?
+            {
+                let embeddings =
+                    ExplicitVectors { embeddings: Some(embeddings.into()), regenerate };
                 vectors.insert(
                     name,
                     serde_json::to_value(embeddings).map_err(InternalError::SerdeJson)?,
diff --git a/crates/meilitool/src/main.rs b/crates/meilitool/src/main.rs
index b967e620c..170bbdcc8 100644
--- a/crates/meilitool/src/main.rs
+++ b/crates/meilitool/src/main.rs
@@ -15,6 +15,7 @@ use meilisearch_types::heed::{
 };
 use meilisearch_types::milli::constants::RESERVED_VECTORS_FIELD_NAME;
 use meilisearch_types::milli::documents::{obkv_to_object, DocumentsBatchReader};
+use meilisearch_types::milli::index::EmbeddingsWithMetadata;
 use meilisearch_types::milli::vector::parsed_vectors::{ExplicitVectors, VectorOrArrayOfVectors};
 use meilisearch_types::milli::{obkv_to_json, BEU32};
 use meilisearch_types::tasks::{Status, Task};
@@ -591,12 +592,21 @@ fn export_documents(
                             .into());
                         };
 
-                        for (embedder_name, (embeddings, regenerate)) in embeddings {
+                        for (
+                            embedder_name,
+                            EmbeddingsWithMetadata { embeddings, regenerate, has_fragments },
+                        ) in embeddings
+                        {
                             let embeddings = ExplicitVectors {
                                 embeddings: Some(VectorOrArrayOfVectors::from_array_of_vectors(
                                     embeddings,
                                 )),
-                                regenerate,
+                                regenerate: regenerate &&
+                                // Meilisearch does not handle well dumps with fragments, because as the fragments
+                                // are marked as user-provided,
+                                // all embeddings would be regenerated on any settings change or document update.
+                                // To prevent this, we mark embeddings has non regenerate in this case.
+                                !has_fragments,
                             };
                             vectors
                                 .insert(embedder_name, serde_json::to_value(embeddings).unwrap());
diff --git a/crates/milli/src/index.rs b/crates/milli/src/index.rs
index b2ec992ba..9f32fdb04 100644
--- a/crates/milli/src/index.rs
+++ b/crates/milli/src/index.rs
@@ -1766,20 +1766,22 @@ impl Index {
         &self,
         rtxn: &RoTxn<'_>,
         docid: DocumentId,
-    ) -> Result<BTreeMap<String, (Vec<Embedding>, bool)>> {
+    ) -> Result<BTreeMap<String, EmbeddingsWithMetadata>> {
         let mut res = BTreeMap::new();
         let embedders = self.embedding_configs();
         for config in embedders.embedding_configs(rtxn)? {
             let embedder_info = embedders.embedder_info(rtxn, &config.name)?.unwrap();
+            let has_fragments = config.config.embedder_options.has_fragments();
             let reader = ArroyWrapper::new(
                 self.vector_arroy,
                 embedder_info.embedder_id,
                 config.config.quantized(),
             );
             let embeddings = reader.item_vectors(rtxn, docid)?;
+            let regenerate = embedder_info.embedding_status.must_regenerate(docid);
             res.insert(
                 config.name.to_owned(),
-                (embeddings, embedder_info.embedding_status.must_regenerate(docid)),
+                EmbeddingsWithMetadata { embeddings, regenerate, has_fragments },
             );
         }
         Ok(res)
@@ -1919,6 +1921,12 @@ impl Index {
     }
 }
 
+pub struct EmbeddingsWithMetadata {
+    pub embeddings: Vec<Embedding>,
+    pub regenerate: bool,
+    pub has_fragments: bool,
+}
+
 #[derive(Debug, Default, Deserialize, Serialize)]
 pub struct ChatConfig {
     pub description: String,
diff --git a/crates/milli/src/update/index_documents/extract/extract_vector_points.rs b/crates/milli/src/update/index_documents/extract/extract_vector_points.rs
index 064cfd154..a1dfa1aad 100644
--- a/crates/milli/src/update/index_documents/extract/extract_vector_points.rs
+++ b/crates/milli/src/update/index_documents/extract/extract_vector_points.rs
@@ -23,7 +23,7 @@ use crate::progress::EmbedderStats;
 use crate::prompt::Prompt;
 use crate::update::del_add::{DelAdd, KvReaderDelAdd, KvWriterDelAdd};
 use crate::update::settings::InnerIndexSettingsDiff;
-use crate::vector::db::{EmbedderInfo, EmbeddingStatus, EmbeddingStatusDelta};
+use crate::vector::db::{EmbedderInfo, EmbeddingStatusDelta};
 use crate::vector::error::{EmbedErrorKind, PossibleEmbeddingMistakes, UnusedVectorsDistribution};
 use crate::vector::extractor::{Extractor, ExtractorDiff, RequestFragmentExtractor};
 use crate::vector::parsed_vectors::{ParsedVectorsDiff, VectorState};
@@ -441,6 +441,8 @@ pub fn extract_vector_points<R: io::Read + io::Seek>(
         {
             let embedder_is_manual = matches!(*runtime.embedder, Embedder::UserProvided(_));
 
+            let (old_is_user_provided, old_must_regenerate) =
+                embedder_info.embedding_status.is_user_provided_must_regenerate(docid);
             let (old, new) = parsed_vectors.remove(embedder_name);
             let new_must_regenerate = new.must_regenerate();
             let delta = match action {
@@ -499,16 +501,19 @@ pub fn extract_vector_points<R: io::Read + io::Seek>(
 
                         let is_adding_fragments = has_fragments && !old_has_fragments;
 
-                        if is_adding_fragments {
+                        if !has_fragments {
+                            // removing fragments
+                            regenerate_prompt(obkv, &runtime.document_template, new_fields_ids_map)?
+                        } else if is_adding_fragments ||
+                        // regenerate all fragments when going from user provided to ! user provided
+                        old_is_user_provided
+                        {
                             regenerate_all_fragments(
                                 runtime.fragments(),
                                 &doc_alloc,
                                 new_fields_ids_map,
                                 obkv,
                             )
-                        } else if !has_fragments {
-                            // removing fragments
-                            regenerate_prompt(obkv, &runtime.document_template, new_fields_ids_map)?
                         } else {
                             let mut fragment_diff = Vec::new();
                             let new_fields_ids_map = new_fields_ids_map.as_fields_ids_map();
@@ -600,7 +605,8 @@ pub fn extract_vector_points<R: io::Read + io::Seek>(
                 docid,
                 &delta,
                 new_must_regenerate,
-                &embedder_info.embedding_status,
+                old_is_user_provided,
+                old_must_regenerate,
             );
 
             // and we finally push the unique vectors into the writer
@@ -657,10 +663,9 @@ fn push_embedding_status_delta(
     docid: DocumentId,
     delta: &VectorStateDelta,
     new_must_regenerate: bool,
-    embedding_status: &EmbeddingStatus,
+    old_is_user_provided: bool,
+    old_must_regenerate: bool,
 ) {
-    let (old_is_user_provided, old_must_regenerate) =
-        embedding_status.is_user_provided_must_regenerate(docid);
     let new_is_user_provided = match delta {
         VectorStateDelta::NoChange => old_is_user_provided,
         VectorStateDelta::NowRemoved => {
diff --git a/crates/milli/src/update/new/extract/vectors/mod.rs b/crates/milli/src/update/new/extract/vectors/mod.rs
index 4ca68027c..71fa9bf09 100644
--- a/crates/milli/src/update/new/extract/vectors/mod.rs
+++ b/crates/milli/src/update/new/extract/vectors/mod.rs
@@ -620,12 +620,35 @@ impl<'a, 'b, 'extractor> Chunks<'a, 'b, 'extractor> {
     where
         'a: 'doc,
     {
-        match &mut self.kind {
-            ChunkType::Fragments { fragments: _, session } => {
-                let doc_alloc = session.doc_alloc();
+        self.set_status(docid, old_is_user_provided, true, false, true);
 
-                if old_is_user_provided | full_reindex {
+        match &mut self.kind {
+            ChunkType::Fragments { fragments, session } => {
+                let doc_alloc = session.doc_alloc();
+                let reindex_all_fragments =
+                                // when the vectors were user-provided, Meilisearch cannot know if they come from a particular fragment,
+                                // and so Meilisearch needs to clear all embeddings in that case.
+                                // Fortunately, as dump export fragment vector with `regenerate` set to `false`,
+                                // this case should be rare and opt-in.
+                                old_is_user_provided ||
+                                // full-reindex case
+                                full_reindex;
+
+                if reindex_all_fragments {
                     session.on_embed_mut().clear_vectors(docid);
+                    let extractors = fragments.iter().map(|fragment| {
+                        RequestFragmentExtractor::new(fragment, doc_alloc).ignore_errors()
+                    });
+                    insert_autogenerated(
+                        docid,
+                        external_docid,
+                        extractors,
+                        document,
+                        &(),
+                        session,
+                        unused_vectors_distribution,
+                    )?;
+                    return Ok(());
                 }
 
                 settings_delta.try_for_each_fragment_diff(
@@ -669,7 +692,6 @@ impl<'a, 'b, 'extractor> Chunks<'a, 'b, 'extractor> {
                         Result::Ok(())
                     },
                 )?;
-                self.set_status(docid, old_is_user_provided, true, false, true);
             }
             ChunkType::DocumentTemplate { document_template, session } => {
                 let doc_alloc = session.doc_alloc();
@@ -690,12 +712,18 @@ impl<'a, 'b, 'extractor> Chunks<'a, 'b, 'extractor> {
 
                 match extractor.diff_settings(document, &external_docid, old_extractor.as_ref())? {
                     ExtractorDiff::Removed => {
+                        if old_is_user_provided || full_reindex {
+                            session.on_embed_mut().clear_vectors(docid);
+                        }
                         OnEmbed::process_embedding_response(
                             session.on_embed_mut(),
                             crate::vector::session::EmbeddingResponse { metadata, embedding: None },
                         );
                     }
                     ExtractorDiff::Added(input) | ExtractorDiff::Updated(input) => {
+                        if old_is_user_provided || full_reindex {
+                            session.on_embed_mut().clear_vectors(docid);
+                        }
                         session.request_embedding(metadata, input, unused_vectors_distribution)?;
                     }
                     ExtractorDiff::Unchanged => { /* do nothing */ }
@@ -722,6 +750,13 @@ impl<'a, 'b, 'extractor> Chunks<'a, 'b, 'extractor> {
     where
         'a: 'doc,
     {
+        self.set_status(
+            docid,
+            old_is_user_provided,
+            old_must_regenerate,
+            false,
+            new_must_regenerate,
+        );
         match &mut self.kind {
             ChunkType::DocumentTemplate { document_template, session } => {
                 let doc_alloc = session.doc_alloc();
@@ -731,10 +766,6 @@ impl<'a, 'b, 'extractor> Chunks<'a, 'b, 'extractor> {
                     new_fields_ids_map,
                 );
 
-                if old_is_user_provided {
-                    session.on_embed_mut().clear_vectors(docid);
-                }
-
                 update_autogenerated(
                     docid,
                     external_docid,
@@ -743,6 +774,7 @@ impl<'a, 'b, 'extractor> Chunks<'a, 'b, 'extractor> {
                     new_document,
                     &external_docid,
                     old_must_regenerate,
+                    old_is_user_provided,
                     session,
                     unused_vectors_distribution,
                 )?
@@ -754,7 +786,21 @@ impl<'a, 'b, 'extractor> Chunks<'a, 'b, 'extractor> {
                 });
 
                 if old_is_user_provided {
+                    // when the document was `userProvided`, Meilisearch cannot know whose fragments a particular
+                    // vector was referring to.
+                    // So as a result Meilisearch will regenerate all fragments on this case.
+                    // Fortunately, since dumps for fragments set regenerate to false, this case should be rare.
                     session.on_embed_mut().clear_vectors(docid);
+                    insert_autogenerated(
+                        docid,
+                        external_docid,
+                        extractors,
+                        new_document,
+                        &(),
+                        session,
+                        unused_vectors_distribution,
+                    )?;
+                    return Ok(());
                 }
 
                 update_autogenerated(
@@ -765,25 +811,18 @@ impl<'a, 'b, 'extractor> Chunks<'a, 'b, 'extractor> {
                     new_document,
                     &(),
                     old_must_regenerate,
+                    false,
                     session,
                     unused_vectors_distribution,
                 )?
             }
         };
 
-        self.set_status(
-            docid,
-            old_is_user_provided,
-            old_must_regenerate,
-            false,
-            new_must_regenerate,
-        );
-
         Ok(())
     }
 
     #[allow(clippy::too_many_arguments)]
-    pub fn insert_autogenerated<D: Document<'a> + Debug>(
+    pub fn insert_autogenerated<'doc, D: Document<'doc> + Debug>(
         &mut self,
         docid: DocumentId,
         external_docid: &'a str,
@@ -791,7 +830,10 @@ impl<'a, 'b, 'extractor> Chunks<'a, 'b, 'extractor> {
         new_fields_ids_map: &'a RefCell<crate::GlobalFieldsIdsMap>,
         unused_vectors_distribution: &UnusedVectorsDistributionBump<'a>,
         new_must_regenerate: bool,
-    ) -> Result<()> {
+    ) -> Result<()>
+    where
+        'a: 'doc,
+    {
         let (default_is_user_provided, default_must_regenerate) = (false, true);
         self.set_status(
             docid,
@@ -956,6 +998,7 @@ fn update_autogenerated<'doc, 'a: 'doc, 'b, E, OD, ND>(
     new_document: ND,
     meta: &E::DocumentMetadata,
     old_must_regenerate: bool,
+    mut must_clear_on_generation: bool,
     session: &mut EmbedSession<'a, OnEmbeddingDocumentUpdates<'a, 'b>, E::Input>,
     unused_vectors_distribution: &UnusedVectorsDistributionBump<'a>,
 ) -> Result<()>
@@ -984,6 +1027,11 @@ where
         };
 
         if must_regenerate {
+            if must_clear_on_generation {
+                must_clear_on_generation = false;
+                session.on_embed_mut().clear_vectors(docid);
+            }
+
             let metadata =
                 Metadata { docid, external_docid, extractor_id: extractor.extractor_id() };
 
@@ -1002,7 +1050,7 @@ where
     Ok(())
 }
 
-fn insert_autogenerated<'a, 'b, E, D: Document<'a> + Debug>(
+fn insert_autogenerated<'doc, 'a: 'doc, 'b, E, D: Document<'doc> + Debug>(
     docid: DocumentId,
     external_docid: &'a str,
     extractors: impl IntoIterator<Item = E>,
diff --git a/crates/milli/src/vector/mod.rs b/crates/milli/src/vector/mod.rs
index f64223e41..873693a34 100644
--- a/crates/milli/src/vector/mod.rs
+++ b/crates/milli/src/vector/mod.rs
@@ -841,6 +841,25 @@ impl EmbedderOptions {
             }
         }
     }
+
+    pub fn has_fragments(&self) -> bool {
+        match &self {
+            EmbedderOptions::HuggingFace(_)
+            | EmbedderOptions::OpenAi(_)
+            | EmbedderOptions::Ollama(_)
+            | EmbedderOptions::UserProvided(_) => false,
+            EmbedderOptions::Rest(embedder_options) => {
+                !embedder_options.indexing_fragments.is_empty()
+            }
+            EmbedderOptions::Composite(embedder_options) => {
+                if let SubEmbedderOptions::Rest(embedder_options) = &embedder_options.index {
+                    !embedder_options.indexing_fragments.is_empty()
+                } else {
+                    false
+                }
+            }
+        }
+    }
 }
 
 impl Default for EmbedderOptions {