You should use canonical tags to indicate the primary Model of a webpage to engines like google. Loads of hreflang faults come from using canonical tags and hreflang characteristics alongside one another improperly. che voi sappiate c'e' modo di integrare nel codice di prestashop il tag per Google Tag Manager https://nanobookmarking.com/story18739853/was-ist-canonical-tag-an-overview