If with “update of the permalinks” you mean updating the post’s slug:
WordPress uses a function called wp_old_slug_redirect()
to find out if you’re looking for a post whose slug was recently changed and redirect you to its new home.
If with “update of the permalinks” you mean updating the post’s slug:
WordPress uses a function called wp_old_slug_redirect()
to find out if you’re looking for a post whose slug was recently changed and redirect you to its new home.