title: amp-html with multiple canonicals
body: <p>We are working on a site for advertising products that you can purchase in another page (is it called aggregator in English?). For improving SEO, we were recommended to do an AMP version of the page. We did two versions of the web, one "standard" version and an AMP version.</p>
  
  <p>Now we want to keep only <a href="https://www.ampproject.org/docs/tutorials/create/prepare_for_discovery#what-if-i-only-have-one-page?" rel="nofollow noreferrer">one version</a>. However, according to the SEO guy, we need to place a <code>link rel="canonical"</code> on the product page to the original website selling the product. But, according to AMP, we need a <code>link rel="canonical"</code> pointing to itself. Can I have two <code>link rel="canonical"</code> or is there any other way of solving this having only one version of the web?
  Right now we don't have this problem because AMP version points to "standard" version and "standard" version points to original website selling the product.  </p>