diff --git a/milli/src/update/index_documents/extract/extract_docid_word_positions.rs b/milli/src/update/index_documents/extract/extract_docid_word_positions.rs
index 96156adb4..9895c1a64 100644
--- a/milli/src/update/index_documents/extract/extract_docid_word_positions.rs
+++ b/milli/src/update/index_documents/extract/extract_docid_word_positions.rs
@@ -30,7 +30,7 @@ pub fn extract_docid_word_positions<R: io::Read + io::Seek>(
     allowed_separators: Option<&[&str]>,
     dictionary: Option<&[&str]>,
     max_positions_per_attributes: Option<u32>,
-) -> Result<(RoaringBitmap, grenad::Reader<BufReader<File>>, ScriptLanguageDocidsMap)> {
+) -> Result<(grenad::Reader<BufReader<File>>, ScriptLanguageDocidsMap)> {
     puffin::profile_function!();
 
     let max_positions_per_attributes = max_positions_per_attributes
@@ -154,7 +154,7 @@ pub fn extract_docid_word_positions<R: io::Read + io::Seek>(
 
     // the returned sorter is serialized as: key: (DocId, FieldId), value: KV<DelAdd, KV<u16, String>>.
     sorter_into_reader(docid_word_positions_sorter, indexer)
-        .map(|reader| (documents_ids, reader, script_language_docids))
+        .map(|reader| (reader, script_language_docids))
 }
 
 /// Check if any searchable fields of a document changed.
diff --git a/milli/src/update/index_documents/extract/mod.rs b/milli/src/update/index_documents/extract/mod.rs
index ee8713ee8..91f3e1c62 100644
--- a/milli/src/update/index_documents/extract/mod.rs
+++ b/milli/src/update/index_documents/extract/mod.rs
@@ -348,7 +348,7 @@ fn send_and_extract_flattened_documents_data(
     let (docid_word_positions_chunk, fid_docid_facet_values_chunks): (Result<_>, Result<_>) =
         rayon::join(
             || {
-                let (documents_ids, docid_word_positions_chunk, script_language_pair) =
+                let (docid_word_positions_chunk, script_language_pair) =
                     extract_docid_word_positions(
                         flattened_documents_chunk.clone(),
                         indexer,
diff --git a/milli/src/update/index_documents/mod.rs b/milli/src/update/index_documents/mod.rs
index 129b67cf0..66e6d16dc 100644
--- a/milli/src/update/index_documents/mod.rs
+++ b/milli/src/update/index_documents/mod.rs
@@ -245,9 +245,6 @@ where
             primary_key,
             fields_ids_map,
             field_distribution,
-            new_external_documents_ids,
-            new_documents_ids,
-            replaced_documents_ids,
             documents_count,
             original_documents,
             flattened_documents,
diff --git a/milli/src/update/index_documents/transform.rs b/milli/src/update/index_documents/transform.rs
index 7c500799d..186974bfe 100644
--- a/milli/src/update/index_documents/transform.rs
+++ b/milli/src/update/index_documents/transform.rs
@@ -32,9 +32,6 @@ pub struct TransformOutput {
     pub primary_key: String,
     pub fields_ids_map: FieldsIdsMap,
     pub field_distribution: FieldDistribution,
-    pub new_external_documents_ids: fst::Map<Cow<'static, [u8]>>,
-    pub new_documents_ids: RoaringBitmap,
-    pub replaced_documents_ids: RoaringBitmap,
     pub documents_count: usize,
     pub original_documents: File,
     pub flattened_documents: File,
@@ -735,15 +732,11 @@ impl<'a, 'i> Transform<'a, 'i> {
         new_external_documents_ids_builder.into_iter().try_for_each(|(key, value)| {
             fst_new_external_documents_ids_builder.insert(key, value)
         })?;
-        let new_external_documents_ids = fst_new_external_documents_ids_builder.into_map();
 
         Ok(TransformOutput {
             primary_key,
             fields_ids_map: self.fields_ids_map,
             field_distribution,
-            new_external_documents_ids: new_external_documents_ids.map_data(Cow::Owned).unwrap(),
-            new_documents_ids: self.new_documents_ids,
-            replaced_documents_ids: self.replaced_documents_ids,
             documents_count: self.documents_count,
             original_documents: original_documents.into_inner().map_err(|err| err.into_error())?,
             flattened_documents: flattened_documents
@@ -889,11 +882,6 @@ impl<'a, 'i> Transform<'a, 'i> {
             primary_key,
             fields_ids_map: new_fields_ids_map,
             field_distribution,
-            // FIXME: remove this now unused field
-            new_external_documents_ids: fst::Map::default().map_data(Cow::Owned).unwrap(),
-            new_documents_ids: documents_ids,
-            // FIXME: remove this now unused field
-            replaced_documents_ids: RoaringBitmap::default(),
             documents_count,
             original_documents: original_documents.into_inner().into_inner(),
             flattened_documents: flattened_documents.into_inner().into_inner(),