Can't remove old mirrored repository settings in error

Summary

With many of my repos, I go into the Mirroring repositories settings and see a list of several older push / pull settings I had configured. I delete all of them, then refresh the page, and see that one of them is still there. Last synced is "never" and says disabled and in error. I want to delete this but cannot.

Steps to reproduce

You need a mirror in error and disabled Delete it, refresh the page and it's back