private void removeExt(InlongGroupExtInfo extInfo) {
        if (extInfo == null || extInfo.getId() == null) {
            return;
        }
        groupExtMapper.deleteByPrimaryKey(extInfo.getId());
    }
Add constraints to the start and end time of the offline synchronization group.
1. startTime must >= current time
2. endTime must >= startTime
inlong-manager/manager-service/src/main/java/org/apache/inlong/manager/service/group/InlongGroupServiceImpl.java