diff --git a/api/db/services/document_service.py b/api/db/services/document_service.py
index 0abf1b1f3..514b3fd87 100644
--- a/api/db/services/document_service.py
+++ b/api/db/services/document_service.py
@@ -41,6 +41,7 @@ from rag.utils.redis_conn import REDIS_CONN
 from rag.utils.doc_store_conn import OrderByExpr
 from common import settings
 
+
 class DocumentService(CommonService):
     model = Document
 
diff --git a/api/db/services/knowledgebase_service.py b/api/db/services/knowledgebase_service.py
index fbd193509..6b39a4fe3 100644
--- a/api/db/services/knowledgebase_service.py
+++ b/api/db/services/knowledgebase_service.py
@@ -28,6 +28,7 @@ from common.constants import StatusEnum
 from api.constants import DATASET_NAME_LIMIT
 from api.utils.api_utils import get_parser_config, get_data_error_result
 
+
 class KnowledgebaseService(CommonService):
     """Service class for managing knowledge base operations.
 
@@ -396,7 +397,7 @@ class KnowledgebaseService(CommonService):
         if dataset_name == "":
             return False, get_data_error_result(message="Dataset name can't be empty.")
         if len(dataset_name.encode("utf-8")) > DATASET_NAME_LIMIT:
-            return get_data_error_result(message=f"Dataset name length is {len(dataset_name)} which is larger than {DATASET_NAME_LIMIT}")
+            return False, get_data_error_result(message=f"Dataset name length is {len(dataset_name)} which is larger than {DATASET_NAME_LIMIT}")
 
         # Deduplicate name within tenant
         dataset_name = duplicate_name(