diff --git a/api/service/QuestionQa.go b/api/service/QuestionQa.go
index e965939..7c70502 100644
--- a/api/service/QuestionQa.go
+++ b/api/service/QuestionQa.go
@@ -384,6 +384,8 @@ func (r *QuestionQaService) PutQuestionQa(qaId int64, req requests.PutQuestionQa
 		if repeatQaIdStr != questionQa.RepeatQaId {
 			questionQaData["repeat_qa_id"] = repeatQaIdStr
 		}
+	} else {
+		questionQaData["repeat_qa_id"] = ""
 	}
 
 	// 背景图