Throughout the site by default the author is displayed at the top of the page, next to the date. In some articles it is additionally indicated in the article. Moreover, on some pages the names of the authors in these blocks are different (for example, on this page). Therefore, I believe that as the author you need to specify a standard tag, which is next to the date. And the name of the additional author to leave in the article. So the template will accurately display the original page and there will be no errors.