diff --git a/api/core/ops/entities/trace_entity.py b/api/core/ops/entities/trace_entity.py
index 3dc3ac60a3169c..17eba251dc8551 100644
--- a/api/core/ops/entities/trace_entity.py
+++ b/api/core/ops/entities/trace_entity.py
@@ -5,12 +5,12 @@
 
 
 class BaseTraceInfo(BaseModel):
-    message_id: str
+    message_id: Optional[str] = None
     message_data: Any
     inputs: Union[str, dict[str, Any], list, None]
     outputs: Union[str, dict[str, Any], list, None]
-    start_time: datetime
-    end_time: datetime
+    start_time: Optional[datetime] = None
+    end_time: Optional[datetime] = None
     metadata: dict[str, Any]
 
 
diff --git a/api/core/ops/langfuse_trace/langfuse_trace.py b/api/core/ops/langfuse_trace/langfuse_trace.py
index e966e220f92ec4..ba37441c8aa2cd 100644
--- a/api/core/ops/langfuse_trace/langfuse_trace.py
+++ b/api/core/ops/langfuse_trace/langfuse_trace.py
@@ -158,7 +158,7 @@ def message_trace(
                 "total_tokens": trace_info.total_tokens,
                 "error": trace_info.error,
                 "provider_response_latency": message_data.provider_response_latency,
-                "created_at": trace_info.start_at,
+                "created_at": trace_info.start_time,
             },
             output=trace_info.outputs,
             metadata=metadata,
@@ -179,7 +179,7 @@ def message_trace(
         langfuse_generation_data = LangfuseGeneration(
             name=f"generation_{message_id}",
             trace_id=message_id,
-            start_time=trace_info.start_at,
+            start_time=trace_info.start_time,
             end_time=trace_info.end_time,
             model=message_data.model_id,
             input=trace_info.inputs,
diff --git a/api/core/ops/langsmith_trace/langsmith_trace.py b/api/core/ops/langsmith_trace/langsmith_trace.py
index 3e173ea22985ed..a2db80e9c248c8 100644
--- a/api/core/ops/langsmith_trace/langsmith_trace.py
+++ b/api/core/ops/langsmith_trace/langsmith_trace.py
@@ -169,7 +169,7 @@ def message_trace(self, trace_info: MessageTraceInfo, **kwargs):
             name=f"message_{message_id}",
             inputs=trace_info.inputs,
             run_type=LangSmithRunType.chain,
-            start_time=trace_info.start_at,
+            start_time=trace_info.start_time,
             end_time=trace_info.end_time,
             outputs=message_data.answer,
             extra={
@@ -189,7 +189,7 @@ def message_trace(self, trace_info: MessageTraceInfo, **kwargs):
             name=f"llm_{message_id}",
             inputs=trace_info.inputs,
             run_type=LangSmithRunType.llm,
-            start_time=trace_info.start_at,
+            start_time=trace_info.start_time,
             end_time=trace_info.end_time,
             outputs=message_data.answer,
             extra={
diff --git a/api/core/ops/trace_queue_manager.py b/api/core/ops/trace_queue_manager.py
index 4a177c51b307de..444b983b34d303 100644
--- a/api/core/ops/trace_queue_manager.py
+++ b/api/core/ops/trace_queue_manager.py
@@ -183,7 +183,7 @@ def message_trace(self, message_id):
             inputs=inputs,
             outputs=message_data.answer,
             file_list=message_data.message[0].get("files", []),
-            start_at=created_at,
+            start_time=created_at,
             end_time=created_at + timedelta(seconds=message_data.provider_response_latency),
             metadata=metadata,
             message_file_data=message_file_data,