update

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

@@ -263,7 +263,7 @@ public class ClassGroupServiceImpl extends BaseServiceImpl<Integer, ClassGroup>
     @Override
     @Transactional(rollbackFor = Exception.class)
     public List<HighClassGroupDto> addHighClassGroup(List<HighClassGroupDto> highClassGroupList) throws Exception {
-        MusicGroup musicGroup = musicGroupDao.get(highClassGroupList.get(0).getMusicGroupId());
+        MusicGroup musicGroup = musicGroupDao.getLocked(highClassGroupList.get(0).getMusicGroupId());
 
         int highClassGroupNum = studentRegistrationDao.findMusicGroupStudentNum(musicGroup.getId()) / 5;
         if(highClassGroupList.size() > highClassGroupNum){