diff --git a/apps/models/llm.py b/apps/models/llm.py
index 4396347a2c31126df93a3093bb38a5ffa776ece2..058c3e4b74cf02ad5ca39c0ded55f427c5a70b51 100644
--- a/apps/models/llm.py
+++ b/apps/models/llm.py
@@ -65,9 +65,9 @@ class LLMData(Base):
     """大模型API类型"""
     llmDescription: Mapped[str] = mapped_column(String(2000), default="", nullable=False)  # noqa: N815
     """大模型描述"""
-    createdAt: Mapped[DateTime] = mapped_column(  # noqa: N815
-        DateTime,
-        default_factory=lambda: datetime.now(tz=UTC),
+    createdAt: Mapped[datetime] = mapped_column(  # noqa: N815
+        DateTime(timezone=True),
+        default_factory=lambda: datetime.now(UTC),
         init=False,
         nullable=False,
     )
diff --git a/apps/routers/llm.py b/apps/routers/llm.py
index 7990f0aca00e05d0c6de1cd30b629685a10e5cd9..2e36347316b6803a0d630cf09254896b0069f521 100644
--- a/apps/routers/llm.py
+++ b/apps/routers/llm.py
@@ -1,6 +1,7 @@
 # Copyright (c) Huawei Technologies Co., Ltd. 2023-2025. All rights reserved.
 """FastAPI 大模型相关接口"""
 
+import logging
 from typing import cast
 
 from fastapi import APIRouter, Depends, Request, status
@@ -37,6 +38,7 @@ admin_router = APIRouter(
         Depends(verify_admin),
     ],
 )
+_logger = logging.getLogger(__name__)
 
 
 @router.get("/provider", response_model=ListLLMRsp,
@@ -141,6 +143,7 @@ async def change_global_llm(request: Request, req: UpdateSpecialLlmReq) -> JSONR
             ),
         )
     except ValueError as e:
+        _logger.exception("[llm] 更改全局LLM设置失败")
         return JSONResponse(
             status_code=status.HTTP_400_BAD_REQUEST,
             content=jsonable_encoder(
@@ -161,6 +164,7 @@ async def create_llm(req: UpdateLLMReq) -> JSONResponse:
     try:
         await LLMManager.update_llm(req.llm_id, req)
     except ValueError as e:
+        _logger.exception("[llm] 创建或更新大模型配置失败")
         return JSONResponse(
             status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
             content=jsonable_encoder(
@@ -191,6 +195,7 @@ async def delete_llm(llmId: str) -> JSONResponse:  # noqa: N803
     try:
         await LLMManager.delete_llm(llmId)
     except ValueError as e:
+        _logger.exception("[llm] 删除大模型配置失败")
         return JSONResponse(
             status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
             content=jsonable_encoder(
diff --git a/apps/schemas/request_data.py b/apps/schemas/request_data.py
index 28df1ab204e4db64243cb93af788d3b3074789ff..687b1cded4e3b8a2bb2101ef508a294eeab2ecd1 100644
--- a/apps/schemas/request_data.py
+++ b/apps/schemas/request_data.py
@@ -50,7 +50,7 @@ class PutFlowReq(BaseModel):
 class UpdateLLMReq(BaseModel):
     """更新大模型请求体"""
 
-    llm_id: str | None = Field(default=None, description="大模型ID", alias="id")
+    llm_id: str = Field(description="大模型ID", alias="id")
     base_url: str = Field(default="", description="OpenAI API Base URL", alias="baseUrl")
     api_key: str = Field(default="", description="OpenAI API Key", alias="apiKey")
     model_name: str | None = Field(default=None, description="模型名称", alias="modelName")
diff --git a/apps/services/llm.py b/apps/services/llm.py
index a3774f0022e3d00fffc2a95df0fd81d1f3b738df..925a24e48b54993982bed9e54d381fb75a6d2a8f 100644
--- a/apps/services/llm.py
+++ b/apps/services/llm.py
@@ -99,23 +99,23 @@ class LLMManager:
 
 
     @staticmethod
-    async def update_llm(llm_id: str | None, req: UpdateLLMReq) -> str:
+    async def update_llm(llm_id: str, req: UpdateLLMReq) -> str:
         """
-        创建大模型
+        创建或更新大模型
 
-        :param req: 创建大模型请求体
-        :return: 大模型对象
+        :param llm_id: 大模型ID
+        :param req: 创建或更新大模型请求体
+        :return: 大模型ID
         """
         async with postgres.session() as session:
-            if llm_id is not None:
-                llm = (await session.scalars(
-                    select(LLMData).where(
-                        LLMData.id == llm_id,
-                    ),
-                )).one_or_none()
-                if not llm:
-                    err = f"[LLMManager] LLM {llm_id} 不存在"
-                    raise ValueError(err)
+            llm = (await session.scalars(
+                select(LLMData).where(
+                    LLMData.id == llm_id,
+                ),
+            )).one_or_none()
+
+            if llm:
+                # 更新现有条目
                 llm.baseUrl = req.base_url
                 llm.apiKey = req.api_key
                 llm.modelName = req.model_name
@@ -126,8 +126,8 @@ class LLMManager:
                 if req.llm_type is not None:
                     llm.llmType = req.llm_type
                 llm.extraConfig = req.extra_data or {}
-                await session.commit()
             else:
+                # 创建新条目
                 llm_data = {
                     "id": llm_id,
                     "baseUrl": req.base_url,
@@ -142,7 +142,8 @@ class LLMManager:
                 }
                 llm = LLMData(**llm_data)
                 session.add(llm)
-                await session.commit()
+
+            await session.commit()
             return llm.id