老师确认增加群组

mec-biz/src/main/java/com/ym/mec/biz/service/impl/MusicGroupServiceImpl.java

@@ -144,6 +144,7 @@ public class MusicGroupServiceImpl extends BaseServiceImpl<String, MusicGroup> i
                     //原来乐团的注册学生
                 List<StudentRegistration> musicGroupStudentRegistrationList = studentRegistrationService.findStudentListByIdList(e.getRegisterIdList());
                 for (StudentRegistration studentRegistration : musicGroupStudentRegistrationList) {
+                    studentRegistration.setId(null);
                     studentRegistration.setMusicGroupStatus(ClassGroupStudentStatusEnum.NORMAL);
                     studentRegistration.setPaymentStatus(PaymentStatusEnum.NO);
                     studentRegistration.setMusicGroupId(musicGroupId);