Case in point: You have an e-commerce website with item pages for various measurements of a certain t-shirt. So in short, I entered an if-then statement, in which I advised the template not to include the canonical tag for the items Along with the ID nrs specified. For people products https://www.presta-addons-modules.com/en/seo/prestashop-seo-automatic-hreflang-tags-canonical-tags-on-all-pages.html