diff --git a/api/app/controllers/memory_storage_controller.py b/api/app/controllers/memory_storage_controller.py
index 288b4265..9708b3a5 100644
--- a/api/app/controllers/memory_storage_controller.py
+++ b/api/app/controllers/memory_storage_controller.py
@@ -100,20 +100,16 @@ def create_config(
         svc = DataConfigService(db)
         result = svc.create(payload)
         return success(data=result, msg="创建成功")
-    except ValueError as e:
-        err_str = str(e)
-        if err_str.startswith("DUPLICATE_CONFIG_NAME:"):
-            config_name = err_str.split(":", 1)[1]
-            api_logger.warning(f"重复的配置名称 '{config_name}' 在工作空间 {workspace_id}")
+    except Exception as e:
+        from sqlalchemy.exc import IntegrityError
+        if isinstance(e, IntegrityError) and "uq_workspace_config_name" in str(getattr(e, 'orig', '')):
+            api_logger.warning(f"重复的配置名称 '{payload.config_name}' 在工作空间 {workspace_id}")
             lang = get_language_from_header(x_language_type)
             if lang == "en":
-                msg = fail(BizCode.BAD_REQUEST, "Config name already exists", f"A config named \"{config_name}\" already exists in the current workspace. Please use a different name.")
+                msg = fail(BizCode.BAD_REQUEST, "Config name already exists", f"A config named \"{payload.config_name}\" already exists in the current workspace. Please use a different name.")
             else:
-                msg = fail(BizCode.BAD_REQUEST, "配置名称已存在", f"当前工作空间下已存在名为「{config_name}」的记忆配置，请使用其他名称")
+                msg = fail(BizCode.BAD_REQUEST, "配置名称已存在", f"当前工作空间下已存在名为「{payload.config_name}」的记忆配置，请使用其他名称")
             return JSONResponse(status_code=400, content=msg)
-        api_logger.error(f"Create config failed: {err_str}")
-        return fail(BizCode.INTERNAL_ERROR, "创建配置失败", err_str)
-    except Exception as e:
         api_logger.error(f"Create config failed: {str(e)}")
         return fail(BizCode.INTERNAL_ERROR, "创建配置失败", str(e))
 
diff --git a/api/app/services/memory_storage_service.py b/api/app/services/memory_storage_service.py
index 71f4ff07..beedaae9 100644
--- a/api/app/services/memory_storage_service.py
+++ b/api/app/services/memory_storage_service.py
@@ -115,17 +115,6 @@ class DataConfigService: # 数据配置服务类（PostgreSQL）
 
     # --- Create ---
     def create(self, params: ConfigParamsCreate) -> Dict[str, Any]: # 创建配置参数（仅名称与描述）
-        # 检查同一工作空间下是否已存在同名配置
-        if params.workspace_id and params.config_name:
-            from app.models.memory_config_model import MemoryConfig
-            existing = (
-                self.db.query(MemoryConfig)
-                .filter_by(workspace_id=params.workspace_id, config_name=params.config_name)
-                .first()
-            )
-            if existing:
-                raise ValueError(f"DUPLICATE_CONFIG_NAME:{params.config_name}")
-
         # 如果workspace_id存在且模型字段未全部指定，则自动获取
         if params.workspace_id and not all([params.llm_id, params.embedding_id, params.rerank_id]):
             configs = self._get_workspace_configs(params.workspace_id)