diff --git a/apps/scheduler/scheduler/message.py b/apps/scheduler/scheduler/message.py
index 3c85a4e6993111438616a00e80a901747b7cc58d..2bd18861789ae2c5f8a909a4831a2fe967045c12 100644
--- a/apps/scheduler/scheduler/message.py
+++ b/apps/scheduler/scheduler/message.py
@@ -125,7 +125,7 @@ async def _push_rag_chunk(task: Task, queue: MessageQueue, content: str) -> tupl
                     documentAbstract=content_obj.content.get("abstract", ""),
                     documentType=content_obj.content.get("extension", ""),
                     documentSize=content_obj.content.get("size", 0),
-                    createdAt=round(datetime.now(tz=UTC).timestamp(), 3),
+                    createdAt=round(content_obj.content.get("created_at", datetime.now(tz=UTC).timestamp()), 3),
                 ).model_dump(exclude_none=True, by_alias=True),
             )
     except Exception:
diff --git a/apps/services/rag.py b/apps/services/rag.py
index af3b3e5363228c89c16baad6076d20ac6913fd5b..918962498bf7727dba5e62769c813c4bdb2bf456 100644
--- a/apps/services/rag.py
+++ b/apps/services/rag.py
@@ -312,8 +312,9 @@ class RAG:
                 + "\n\n"
             )
         max_footnote_length = 4
-        while doc_cnt > 0:
-            doc_cnt //= 10
+        tmp_doc_cnt = doc_cnt
+        while tmp_doc_cnt > 0:
+            tmp_doc_cnt //= 10
             max_footnote_length += 1
         buffer = ""
         async for chunk in reasion_llm.call(