Error 500 on group path renaming

Summary

I can't rename the group path, at least on gitlab.com.

Steps to reproduce

1. Access https://gitlab.com/groups/medtrics_/edit

2. Try rename it to "medtrics" or "medtricslab"

3. Error 500

If I try change it to other names works, at least for some options I tried. It was once before named "medtricslab". I can't set it back to "medtricslab", neither to "medtrics" that is my preference but I could rename it from "medtrics_" to "medtrics2" and back to "medtrics_".

Expected behavior

Group path renamed to "medtrics"

Actual behavior

Error 500

Relevant logs and/or screenshots

There is no error details but "Error 500"

Possible fixes

I thought it was because I have a project named "medtrics" but now I can't put the back the name I were using: "medtricslab".