prompt Force delete attributes that have invalid entity_reference

DECLARE
   bug_no varchar2(8) := 'CK925235';
BEGIN

  update ck_migration_objects set ci_created = 'N' where ci_stage = 'CKPREMIG' and ci_name = bug_no;

  for att in 
  (
    select att.id id
    from ci_attributes@r212 att
    where not exists ( select 1
                       from ci_entities@r212 ent
                       where ent.id = att.entity_reference )
    and att.application_system_owned_by in ( select ci_appid
	     				               from ck_migration_objects
						         where ci_stage = 'APPSEL' )
  )
  loop
    ciiutl.delete_element@r212(att.id, 'ATT');
  
    delete from sdd_elements@r212
    where el_id = att.id;
    
  end loop; 

  update ck_migration_objects set ci_created = 'Y' where ci_stage = 'CKPREMIG' and ci_name = bug_no;
   
  commit;
  
EXCEPTION 
  when others then
     dbms_output.put_line (' ** Exception Raised ** ');
     dbms_output.put_line ('...ERROR: '||substrb(sqlerrm, 1, 200));
     raise;
	 
end;
/
