Be aware that Should your store has previously been indexed by Google or another search engine, it'd take some time for your personal modifications to appear within the search results... You could have to Wait and see!   You specify the first URL as the search engine might have issues https://www.presta-addons-modules.com/en/seo/prestashop-seo-automatic-hreflang-tags-canonical-tags-on-all-pages.html