If just one of one's variants is surely an AMP page, follow the AMP rules to indicate the canonical site and AMP variant. Use rel="canonical" link annotations Usually, shifting the HTML or HTTP is okay when you need to change several pages eventually, but this technique won’t provide you properly https://addons.prestashop.com/en/seo-natural-search-engine-optimization/30904-automatic-hreflang-tags-canonical-tags-all-pages-seo.html