@Override
    public Boolean exist(String groupId) {
        Preconditions.expectNotNull(groupId, ErrorCodeEnum.GROUP_ID_IS_EMPTY.getMessage());
        InlongGroupEntity entity = groupMapper.selectByGroupIdWithoutTenant(groupId);
        LOGGER.debug("success to check inlong group {}, exist? {}", groupId, entity != null);
        return entity != null;
    }
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