select * from subdivision;
SET FOREIGN_KEY_CHECKS = 0;
DELETE subdivision 
where objid in ('
SD-5516af0d:180d9a9355d:8e7',
'SD2a85f12e:18082f86015:-79fc');

SET FOREIGN_KEY_CHECKS = 1;

select * from subdivision_task where refid in ('
SD-5516af0d:180d9a9355d:8e7',
'SD2a85f12e:18082f86015:-79fc',
'SD4ed5aa58:187e44fe84e:-11f5');