diff --git a/apps/api/app/api/routes/generation_cover.py b/apps/api/app/api/routes/generation_cover.py
index d52461fe8..bcea7df42 100644
--- a/apps/api/app/api/routes/generation_cover.py
+++ b/apps/api/app/api/routes/generation_cover.py
@@ -747,7 +747,7 @@ def generate_cover(
 
         if cover_url_from_task:
             # 标题已在预览视频渲染时烧录（ASS字幕），封面帧自然包含标题
-            cover_data: dict[str, object] = {
+            cover_data: dict[str, object] = {  # type: ignore[no-redef]
                 "type": "ai_frame",
                 "image_url": cover_url_from_task,
                 "frame_time": 0.0,