Merge branch 'feature/0529-live' of http://git.dayaedu.com/yonge/mec into master_saas

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

@@ -2625,7 +2625,6 @@ public class VipGroupServiceImpl extends BaseServiceImpl<Long, VipGroup> impleme
         if (Objects.isNull(classGroup)) {
             throw new BizException("班级信息错误");
         }
-        classGroup = classGroupDao.lockClassGroup(classGroup.getId());
         Boolean exist = classGroupStudentMapperDao.existByClassGroupIds(classGroup.getId().toString(), userId);
         if (exist) {
             throw new BizException("您已加入此课程");