I have setup some toy projects, all using the netlify DNS with an externally bought domain.
Everything was working as expected: I created a new site, set the custom sub-domain (like slides.mene.dev) and the expected entries appeared in the DNS. However I then deleted the Project and the DNS is still setup.
In the place of the old entry I’d like to set a custom one (CNAME), but I can’t because it still says “This is a system record that cannot be managed directly.”
How to remove those entries?