Problem with "ghost" members

Hi,
I created a forum on my website and also created a testuser for whom I than chamged the name (to Harry Hirsch). Than I deleted the testuser. However, now I still do have two members on my website, testuser and Harry Hirsch but I only see them on the members page of my web site. I don’t see them in the Dashboard under Customer Management → Contact List and also not on the Site Members area. When I click on the member on my website I get a 404 error. Has anybody seen that behavior and if yes, do you know how to solve this?
Thanks a lot

The Wix Forum is a Wix app and not a code related issue, of which this Wix Corvid Forum is for.
https://support.wix.com/en/article/blocking-or-deleting-site-members-in-the-wix-forum

You would be much better suited going through wix Support themselves.
https://support.wix.com/en/article/contacting-wix-support
https://support.wix.com/en/article/contacting-wix-by-phone-3491545