Take note that If the retailer has by now been indexed by Google or any other search engine, it might consider a while for the adjustments to appear within the search engine results... You could have to be patient!   You specify the key URL because the online search engine https://www.presta-addons-modules.com/en/seo/prestashop-seo-automatic-hreflang-tags-canonical-tags-on-all-pages.html