This forces customers to visit the products's website page and choose a mix, as an alternative to only adding the default just one for the cart. Take note that merchandise without having combination will however have an "Include to cart" button from the classification webpage. Many thanks quite a bit. https://addons.prestashop.com/it/seo-indicizzazione-naturale/30904-tag-hreflang-automatici-e-tag-canonici-seo.html