review changes

meilisearch-http/src/index_controller/index_actor/store.rs

@@ -40,6 +40,8 @@ impl MapIndexStore {
 #[async_trait::async_trait]
 impl IndexStore for MapIndexStore {
     async fn create(&self, uuid: Uuid, primary_key: Option<String>) -> IndexResult<Index> {
+        // We need to keep the lock until we are sure the db file has been opened correclty, to
+        // ensure that another db is not created at the same time.
         let mut lock = self.index_store.write().await;
 
         if let Some(index) = lock.get(&uuid) {