Modifying files outside the X folder

[infinite-circle]

Hello everyone,
I get this warning message after pass a merge request pipeline:

This solution MR is modifying files outside the hack folder

What does it mean?

[infinite-loop]

If you’re posting a hacking solution sol(hack), you can’t modify other files outside the hack folder.

[hermit-purple]

your scope is hack but you’re uploading a programming challenge, the correct scope is code