删除学生，退出群组

mec-student/src/main/java/com/ym/mec/student/controller/MusicGroupController.java

@@ -180,7 +180,7 @@ public class MusicGroupController extends BaseController {
             return failed("报名信息有误，请核查");
         }
 
-        StudentPaymentOrder ApplyOrder = studentPaymentOrderService.findMusicGroupApplyOrderByStatus(userId, studentRegistration.getMusicGroupId().toString(), DealStatusEnum.SUCCESS);
+        StudentPaymentOrder ApplyOrder = studentPaymentOrderService.findMusicGroupApplyOrderByStatus(userId, studentRegistration.getMusicGroupId(), DealStatusEnum.SUCCESS);
         if (ApplyOrder != null) {
             return failed("您已支付成功，请勿重复支付");
         }