You specify the first URL because the internet search engine can have trouble determining which just one really should be the principal URL.  The following tutorial will provide you with the best way to enable Canonical URLs in Prestashop 1.five. You should use Ahrefs to unravel this difficulty – https://addons.prestashop.com/ru/seo-natural-search-engine-optimization/31857--rich-snippets-json-ld-opengraph-seo.html