diff --git a/api/core/rag/datasource/vdb/tidb_on_qdrant/tidb_on_qdrant_vector.py b/api/core/rag/datasource/vdb/tidb_on_qdrant/tidb_on_qdrant_vector.py
index e848b39c4..a76b5d579 100644
--- a/api/core/rag/datasource/vdb/tidb_on_qdrant/tidb_on_qdrant_vector.py
+++ b/api/core/rag/datasource/vdb/tidb_on_qdrant/tidb_on_qdrant_vector.py
@@ -3,7 +3,7 @@ import os
 import uuid
 from collections.abc import Generator, Iterable, Sequence
 from itertools import islice
-from typing import TYPE_CHECKING, Any, Optional, Union, cast
+from typing import TYPE_CHECKING, Any, Optional, Union
 
 import qdrant_client
 import requests
@@ -398,7 +398,6 @@ class TidbOnQdrantVector(BaseVector):
 
     def _reload_if_needed(self):
         if isinstance(self._client, QdrantLocal):
-            self._client = cast(QdrantLocal, self._client)
             self._client._load()
 
     @classmethod
diff --git a/api/services/webapp_auth_service.py b/api/services/webapp_auth_service.py
index 085a5039f..bb46bf309 100644
--- a/api/services/webapp_auth_service.py
+++ b/api/services/webapp_auth_service.py
@@ -1,7 +1,7 @@
 import enum
 import secrets
 from datetime import UTC, datetime, timedelta
-from typing import Any, Optional, cast
+from typing import Any, Optional
 
 from werkzeug.exceptions import NotFound, Unauthorized
 
@@ -42,7 +42,7 @@ class WebAppAuthService:
         if account.password is None or not compare_password(password, account.password, account.password_salt):
             raise AccountPasswordError("Invalid email or password.")
 
-        return cast(Account, account)
+        return account
 
     @classmethod
     def login(cls, account: Account) -> str: