This forces consumers to go to the product or service's site and select a combination, in lieu of only including the default 1 into the cart. Notice that products without any blend will nonetheless have an "Insert to cart" button within the group page. Take a look at your Nginx https://singnalsocial.com/story2774575/the-smart-trick-of-balises-hreflang-automatiques-et-balises-canoniques-seo-that-no-one-is-discussing