diff --git a/backend/routers/rank_api_routes.py b/backend/routers/rank_api_routes.py
index 18f3700..f6ddbfa 100644
--- a/backend/routers/rank_api_routes.py
+++ b/backend/routers/rank_api_routes.py
@@ -1322,11 +1322,7 @@ def update_content_classification():
         end_of_day = datetime.combine(today, datetime.max.time())
         
         mgmt_doc = rankings_management_collection.find_one({
-            "mix_name": mix_name,
-            "$or": [
-                {"created_at": {"$gte": start_of_day, "$lte": end_of_day}},
-                {"last_updated": {"$gte": start_of_day, "$lte": end_of_day}}
-            ]
+            "mix_name": mix_name
         })
         if not mgmt_doc:
             return jsonify({"success": False, "message": f"未找到短剧: {mix_name}"})