Duplicate Theme In Same Location

I wonder why this error message pops up. I have a user theme that I am using, and I would like to add a new theme. Both are in the same directory. The new theme definitely doesn't have the same name. So why this error message?

This topic was automatically closed 90 days after the last reply. New replies are no longer allowed.

If you have a query related to it or one of the replies, start a new topic and refer back with a link.