diff --git a/app/core/config.py b/app/core/config.py
index eca5c9c3..1c9b6ec0 100644
--- a/app/core/config.py
+++ b/app/core/config.py
@@ -360,15 +360,19 @@ class Settings(BaseSettings, ConfigModel):
 
         try:
             field = self.__fields__[key]
+            original_value = getattr(self, key)
             if field.name == "API_TOKEN":
-                converted_value, needs_update = self.validate_api_token(value, getattr(self, key))
+                converted_value, needs_update = self.validate_api_token(value, original_value)
             else:
-                converted_value, needs_update = self.generic_type_converter(value, getattr(self, key), field.type_,
+                converted_value, needs_update = self.generic_type_converter(value, original_value, field.type_,
                                                                             field.default, key)
             # 如果没有抛出异常，则统一使用 converted_value 进行更新
             if needs_update or str(value) != str(converted_value):
-                setattr(self, key, converted_value)
-                return self.update_env_config(field, value, converted_value)
+                success, message = self.update_env_config(field, original_value, converted_value)
+                # 仅成功更新配置时，才更新内存
+                if success:
+                    setattr(self, key, converted_value)
+                return success, message
             return True, ""
         except Exception as e:
             return False, str(e)