diff --git a/rag/utils/infinity_conn.py b/rag/utils/infinity_conn.py
index f69324e07f..e2980f19e2 100644
--- a/rag/utils/infinity_conn.py
+++ b/rag/utils/infinity_conn.py
@@ -72,11 +72,11 @@ class InfinityConnection(InfinityConnectionBase):
 
     @staticmethod
     def field_keyword(field_name: str):
-        # Treat "*_kwd" tag-like columns as keyword lists except knowledge_graph_kwd; source_id is also keyword-like.
+        # Treat "*_kwd" tag-like columns as keyword lists except for the fields in the exclusion list; source_id is also keyword-like.
         # source_doc_ids / source_chunk_ids are multi-valued provenance lists (artifact/wiki rows) and must be
         # stored/read/updated as keyword lists so the delete-time ref-count (remove one id, drop row when empty) works.
         if field_name in ("source_id", "source_doc_ids", "source_chunk_ids") or (
-            field_name.endswith("_kwd") and field_name not in ["knowledge_graph_kwd", "docnm_kwd", "important_kwd", "question_kwd"]
+            field_name.endswith("_kwd") and field_name not in ["knowledge_graph_kwd", "docnm_kwd", "important_kwd", "question_kwd", "parent_kwd"]
         ):
             return True
         return False