已开启缴费/已缴费的学员，不容许删除

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

@@ -1618,6 +1618,11 @@ public class StudentRegistrationServiceImpl extends BaseServiceImpl<Long, Studen
     @Transactional(rollbackFor = Exception.class)
     public Boolean batchDelRegs(String musicGroupId, List<Integer> userIds) {
         List<StudentRegistration> registrations = studentRegistrationDao.findStudentListByUserIdList(musicGroupId, userIds);
+        for (StudentRegistration registration : registrations) {
+            if(registration.getPaymentStatus().equals(PaymentStatusEnum.OPEN)||registration.getPaymentStatus().equals(PaymentStatusEnum.YES)){
+                throw new BizException("开启缴费/已缴费的学员不能删除");
+            }
+        }
         if (registrations.size() <= 0) {
             throw new BizException("删除的学员不存在，请核查");
         }