Google Search Console’s coverage report lists several reasons a page might be “valid”. What does this mean? Is there something you need to do about this?
Nothing. These are in Google right now and appear that you want them. However, you should check to make sure something isn’t supposed to be hidden.
You should add a “noindex” robots meta tag to the page or (better) require a login to view the page. Treat this page like a “Indexed, though blocked by robots.txt” warning.
Add a canonical tag to this page and all duplicated pages that are like this page. The canonical tag, as Google is suggesting, should point to this original page.
To learn more about valid pages in Google Search Console, read: https://support.google.com/webmasters/answer/7440203