PROMPT Force delete duplicate Navigation Action Items

DECLARE
   bug_no varchar2(8) := 'CK914853';
BEGIN

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

  for nai in
  (
    select nai.id id
    from ci_navigation_action_items@r212 nai
    where nai.id < ( select max(nai2.id)
 			   from ci_navigation_action_items@r212 nai2
                     where nai.id != nai2.id
                     and   nai.name = nai2.name 
                     and   nai.mcn_reference = nai2.mcn_reference
                   )    
    and nai.application_system_owned_by in ( select ci_appid
	    					         from ck_migration_objects
						         where ci_stage = 'APPSEL' )
  )
  loop
    ciiutl.delete_element@r212(nai.id, 'ACI');
  
    delete from sdd_elements@r212
    where el_id = nai.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;
/
