PROMPT Force delete primary key constraints that have an invalid table reference

DECLARE
   bug_no varchar2(8) := 'CK919734';
BEGIN

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

  for pco in
  (
    select pco.id
    from ci_primary_key_constraints@r212 pco
    where not exists ( select 1 from
                       ci_relation_definitions@r212 rel
                       where rel.id = pco.table_reference )
    and pco.application_system_owned_by in ( select ci_appid
    					               from ck_migration_objects
						         where ci_stage = 'APPSEL' )
  )
  loop
    ciiutl.delete_element@r212(pco.id, 'OCO');
  
    delete from sdd_elements@r212
    where el_id = pco.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;
/
