diff --git a/codex/librarian/scribe/importer/const.py b/codex/librarian/scribe/importer/const.py
index 4808a38b1..68c0437b9 100644
--- a/codex/librarian/scribe/importer/const.py
+++ b/codex/librarian/scribe/importer/const.py
@@ -334,23 +334,6 @@ def _metron_fts_values(values: tuple) -> tuple:
         Universe: ((NAME_FIELD_NAME,), _IDENTIFIER_RELS, DESIGNATION_FIELD_NAME),
     }
 )
-_IDENTIFIED_SELECT_RELATED = ("identifier", "identifier__source")
-MODEL_SELECT_RELATED: MappingProxyType[type[BaseModel], tuple[str, ...]] = (
-    MappingProxyType(
-        {
-            **dict.fromkeys(IDENTIFIED_MODELS, _IDENTIFIED_SELECT_RELATED),
-            Identifier: (IDENTIFIER_SOURCE_FIELD_NAME,),
-            Publisher: _IDENTIFIED_SELECT_RELATED,
-            Imprint: ("publisher",),
-            Series: ("publisher", "imprint"),
-            Volume: ("publisher", "imprint", "series"),
-            Credit: (CREDIT_PERSON_FIELD_NAME, CREDIT_ROLE_FIELD_NAME),
-            Reprint: _IDENTIFIED_SELECT_RELATED,
-            StoryArcNumber: (STORY_ARC_FIELD_NAME,),
-            Universe: _IDENTIFIED_SELECT_RELATED,
-        }
-    )
-)
 FIELD_NAME_KEYS_REL_MAP = MappingProxyType(
     {
         # ``related_model`` is typed ``type[Model] | Literal['self']
diff --git a/codex/librarian/scribe/importer/query/foreign_keys.py b/codex/librarian/scribe/importer/query/foreign_keys.py
index 010588395..b2bfadc02 100644
--- a/codex/librarian/scribe/importer/query/foreign_keys.py
+++ b/codex/librarian/scribe/importer/query/foreign_keys.py
@@ -4,7 +4,6 @@
     CREATE_FKS,
     FK_KEYS,
     MODEL_REL_MAP,
-    MODEL_SELECT_RELATED,
     QUERY_MODELS,
     TOTAL,
     UPDATE_FKS,
@@ -37,13 +36,10 @@ def query_existing_mds(
             batch_proposed_key_tuples,
         )
         rels = MODEL_REL_MAP[model]
-        select_related = MODEL_SELECT_RELATED.get(model, ())
         # A comprehension, not filter(bool, ...): bool's signature widens the
         # element type to object, which values_list refuses.
         fields = tuple(field for field in flatten(rels) if field)
-        qs = model.objects
-        qs = qs.select_related(*select_related)
-        qs = qs.filter(fk_filter).distinct().values_list(*fields)
+        qs = model.objects.filter(fk_filter).distinct().values_list(*fields)
         extra_index = get_key_index(model)
         has_id = bool(rels[1])
         existing_mds = {}