[Mailman-Developers] Re: flufl.lock._lockfile.NotLockedError: Already unlocked

This seems to be because you removed the var/ directory without stopping Mailman Core. Note that var/ directory is continuously needed by Mailman Core when running since it stores it's runtime information there. If you remove the var/ directory without stopping Mailman Core, you'll end up in weird situations like this.

Make sure you always do mailman stop and only then remove the var/ directory.

Ok thanks, I understood it!