private boolean isScheduleInfoExist(InlongGroupEntity entity) {
        return DATASYNC_OFFLINE_MODE.equals(entity.getInlongGroupMode())
                && scheduleOperator.scheduleInfoExist(entity.getInlongGroupId());
    }
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