So, in this post, I suggested to replace rootsystem with root-system. A user suggested root-systems instead, which is indeed better.
So having 7 upvotes and no downvotes, I decided to implement the change. But then I ran into the system:
How could I ever go about implementing this change if the system prohibits its creation in the first place? Can it only be done by moderators?
(As an aside, I think the red text should say "Your edit couldn't be submitted." instead of "question".)