In some cases, you may unintentionally noindex some different pages you’ve referenced in your hreflang tags. When this happens, search engines like google and yahoo received’t Keep to the tag on the web site and gained’t Keep to the return link on the web site that references the alternative variations. https://addons.prestashop.com/en/seo-natural-search-engine-optimization/31857-automatic-google-rich-snippets-json-ld-open-graph-seo.html