500 error on immediate project deletion

Summary

I'm trying to remove my project on GitLab.com. It's delayed to 2019-12-31. I'm pressing on "Delete" again to remove it immediately and getting 500 error.

Steps to reproduce

1. Remove project and get delay.
2. Delete project immediately.

Example Project

https://gitlab.com/AlexWayfer/imported-test-project

What is the current bug behavior?

500 error.

What is the expected correct behavior?

Successful immediate deletion.

Relevant logs and/or screenshots

Output of checks

This bug happens on GitLab.com

Possible fixes

Don't know.