Incorrect canonical implementation: Be sure that the canonical URL is correct and would not conflict with hreflang directives. This option is particularly useful for endorsing buys. The text and placement with the warn depend on the concept; while in the default theme, it is "Very last items in inventory", which https://addons.prestashop.com/pl/seo-pozycjonowanie-naturalne/30904-automatyczne-tagi-hreflang-i-tagi-kanoniczne-seo.html