You specify the first URL as the search engine could have problems analyzing which 1 need to be the main URL.  The following tutorial will demonstrate how to allow Canonical URLs in Prestashop 1.5. By default, PrestaShop's deep URLs (that is, certain pages in lieu of on the internet https://addons.prestashop.com/it/seo-indicizzazione-naturale/31857-google-rich-snippet-automatico-json-ld-open-graph-seo.html