Search engines like google and yahoo don’t index 4XX pages since they don’t function. Subsequently, they’ll disregard any canonical tags pointing to this sort of pages and sometimes turn out indexing the incorrect (non-canonical) Edition of the page. php file. I need to update the canonical link. I have before employed https://webcastlist.com/story19977639/5-simple-statements-about-canonical-link-tag-not-found-explained