The module automatically adds a default canonical url to all of your item, category, CMS pages only. By default, the module makes use of The existing url from the page since the default canonical url. You can use Ahrefs to resolve this challenge – just go to the listing of https://www.presta-addons-modules.com/en/opencart-seo-automatic-google-rich-snippets-json-ld-integration-opengraph-twitter-tags-schemaorg.html