fix: fixes errors

[yokwejuste]

Summary

Fixes the material used validation error during creation

[github-actions]

pre-commit checks failed ❌❌❌
make sure you have pre-commit set up locally (see the README.md for instructions).
If you have set up pre-commit locally, you may need to undo this commit and
run "pre-commit" locally to see what the errors are.

[tuxology]

I am merging this one as an exception (even with failing pre-commit checks) since it is affecting the flow of new project creation @NdibeRaymond