diff --git a/api/db/services/document_service.py b/api/db/services/document_service.py
index 7b0bce6e62..348d8a3a60 100644
--- a/api/db/services/document_service.py
+++ b/api/db/services/document_service.py
@@ -709,7 +709,7 @@ class DocumentService(CommonService):
     def clear_chunk_num(cls, doc_id):
         """Deprecated: use delete_document_and_update_kb_counts instead."""
         doc = cls.model.get_by_id(doc_id)
-        assert doc, "Can't fine document in database."
+        assert doc, "Can't find document in database."
 
         num = (
             Knowledgebase.update(token_num=Knowledgebase.token_num - doc.token_num, chunk_num=Knowledgebase.chunk_num - doc.chunk_num, doc_num=Knowledgebase.doc_num - 1)
@@ -722,7 +722,7 @@ class DocumentService(CommonService):
     @DB.connection_context()
     def clear_chunk_num_when_rerun(cls, doc_id):
         doc = cls.model.get_by_id(doc_id)
-        assert doc, "Can't fine document in database."
+        assert doc, "Can't find document in database."
 
         num = (
             Knowledgebase.update(
diff --git a/common/connection_utils.py b/common/connection_utils.py
index 86ebc371d8..0218d99a28 100644
--- a/common/connection_utils.py
+++ b/common/connection_utils.py
@@ -115,7 +115,6 @@ async def construct_response(code=RetCode.SUCCESS, message="success", data=None,
     response.headers["Access-Control-Allow-Origin"] = "*"
     response.headers["Access-Control-Allow-Method"] = "*"
     response.headers["Access-Control-Allow-Headers"] = "*"
-    response.headers["Access-Control-Allow-Headers"] = "*"
     response.headers["Access-Control-Expose-Headers"] = "Authorization"
     return response
 
@@ -135,6 +134,5 @@ def sync_construct_response(code=RetCode.SUCCESS, message="success", data=None,
     response.headers["Access-Control-Allow-Origin"] = "*"
     response.headers["Access-Control-Allow-Method"] = "*"
     response.headers["Access-Control-Allow-Headers"] = "*"
-    response.headers["Access-Control-Allow-Headers"] = "*"
     response.headers["Access-Control-Expose-Headers"] = "Authorization"
     return response