title: SequelizeDatabaseError: ER_ROW_IS_REFERENCED: Cannot delete or update a parent row: a foreign key constraint fails
body: <p>I set <code>FOREIGN_KEY_CHECKS</code> to zero before syncing my model.
  But I still get </p>
  
  <blockquote>
    <p>SequelizeDatabaseError: ER_ROW_IS_REFERENCED: Cannot delete or update a parent row: a foreign key constraint fails. </p>
  </blockquote>