Cannot do anything with project (404 error)

Summary

On GitLab.com, I get a 404 trying to access or delete a project from the Groups project list.

Steps to reproduce

I have a project that was originally named abc123def and at some point was renamed to abc123deft. I'm not sure how it was renamed, but the Dashboard link reads abc123def but points to abc123deft.

The problem is that I can't do anything with that project. Opening it returns a 404. Deleting it through the Groups > Settings > Projects red "Remove" button returns a 404.

I tried using curl with the same URL attempted via the browser and with abc123def I get a 404 but with a page title of "The page you're looking for could not be found (404)". Using curl with abc123deft I get a title of "Not Found".

I cannot create another project named abc123def because a project by that name already exists. I cannot create another project named abc123deft because the project is still being deleted. (It's been over 5 months now.)

Example Project

abc123def -> https://gitlab.com/srst/abc123deft

What is the current bug behavior?

The project remains on the project list and cannot be accessed, deleted, and new projects cannot be created with the old name or the new name.

What is the expected correct behavior?

The deleted project should be removed from the list and new project should be created with the same name as the deleted project.

Output of checks

This bug happens on GitLab.com!