-- RUN NEXT 3 LINES BEFORE RUNNING POPULATE SCRIPT alter table manager DISABLE constraint manager_club_fk; alter table club DISABLE constraint club_manager_fk; alter table club DISABLE constraint club_competition_fk; -- RUN 3 LINES BEFORE RUNNING POPULATE SCRIPT -- RUN NEXT 3 LINES AFTER RUNNING POPULATE SCRIPT alter table manager ENABLE constraint manager_club_fk; alter table club ENABLE constraint club_manager_fk; alter table club ENABLE constraint club_competition_fk; -- RUN LAST 3 LINES AFTER RUNNING POPULATE SCRIPT