diff --git a/video-gen-api/app/services/generation/provider_service.py b/video-gen-api/app/services/generation/provider_service.py
index f2a65218..8463a26b 100644
--- a/video-gen-api/app/services/generation/provider_service.py
+++ b/video-gen-api/app/services/generation/provider_service.py
@@ -51,7 +51,9 @@ def _snapshot_owner(task: GenerationOwner) -> SimpleNamespace:
         for key, value in vars(task).items()
         if key != "_sa_instance_state"
     }
-    values.setdefault("generation_mode", getattr(task, "generation_mode", None) or "generation_record")
+    # 只有原对象确实有 generation_mode 时才保留，避免 SimpleNamespace 快照被误判为 ChatGenerationTask
+    if getattr(task, "generation_mode", None):
+        values.setdefault("generation_mode", task.generation_mode)
     return SimpleNamespace(**values)