diff --git a/internal/cron_task/clear_msg.go b/internal/cron_task/clear_msg.go
index 938a446ec..ba22eac38 100644
--- a/internal/cron_task/clear_msg.go
+++ b/internal/cron_task/clear_msg.go
@@ -166,6 +166,10 @@ func checkMaxSeqWithMongo(operationID, ID string, diffusionType int) error {
 	if err != nil {
 		return utils.Wrap(err, "GetNewestMsg failed")
 	}
+	if msg == nil {
+		log.NewInfo(operationID, "msg has del")
+		return nil
+	}
 	msgPb := &server_api_params.MsgData{}
 	err = proto.Unmarshal(msg.Msg, msgPb)
 	if err != nil {
diff --git a/pkg/common/db/mongoModel.go b/pkg/common/db/mongoModel.go
index 724fd8d73..15ffbd88f 100644
--- a/pkg/common/db/mongoModel.go
+++ b/pkg/common/db/mongoModel.go
@@ -305,7 +305,7 @@ func (d *DataBases) ReplaceMsgToBlankByIndex(suffixID string, index int) error {
 			msg.SendTime = 0
 		}
 	}
-	_, err = c.UpdateOne(ctx, bson.M{"uid": suffixID}, userChat)
+	_, err = c.UpdateOne(ctx, bson.M{"uid": suffixID}, bson.M{"$set": bson.M{"msg": userChat.Msg}})
 	return err
 }
 
@@ -329,7 +329,7 @@ func (d *DataBases) GetNewestMsg(ID string) (msg *MsgInfo, err error) {
 		}
 		return nil, errors.New("len(userChats[0].Msg) < 0")
 	}
-	return nil, errors.New("len(userChats) < 0")
+	return nil, nil
 }
 
 func (d *DataBases) GetMsgBySeqListMongo2(uid string, seqList []uint32, operationID string) (seqMsg []*open_im_sdk.MsgData, err error) {