Search engines don’t index 4XX pages given that they don’t do the job. Due to this fact, they’ll dismiss any canonical tags pointing to such pages and often finish up indexing the incorrect (non-canonical) Edition from the page. che voi sappiate c'e' modo di integrare nel codice di prestashop il tag https://sirketlist.com/story20317766/etiquetas-autom%C3%A1ticas-hreflang-canonical-etiquetas-seo-for-dummies