diff --git a/backend/app/services/prediction_service.py b/backend/app/services/prediction_service.py
index 406e5ee..fc244a8 100644
--- a/backend/app/services/prediction_service.py
+++ b/backend/app/services/prediction_service.py
@@ -613,8 +613,8 @@ class PredictionService:
             # 保存推荐记录
             for rec in daily_recommendations:
                 bet_record = BetRecord(
-                    lottery_type=rec['lottery_type'],
                     batch_id=rec['batch_id'],
+                    issue='',  # 暂时为空，等开奖后更新
                     recommend_type=rec['recommend_type'],
                     numbers=rec['numbers'],
                     created_at=rec['created_at'],