Board Thread:Support Requests - Getting Technical/@comment-38433561-20190217183831/@comment-34888194-20190217233020

Well, you can add a page (as if you add a page of a new article) and type MediaWiki:User-identity-box-group-sysop as your title of the page. It should send you a page that has the content "admin" in the page. Replace "admin" to your preferred name that represents "admin" and then every user that has the admin tag next to the name will be replaced into a name that you use in MediaWiki:User-identity-box-group-sysop, instead.