meaning of title of merge request on gitlab?

I've opened a very, very preliminary MR. The Commentary instructs me to tag it "WIP: <title>", but gitlab seems to suggest that in order to prevent it from being merged, I need "Draft: <title>". When a merge request is both WIP and Draft, how should it be titled? (The MR in question is https://gitlab.haskell.org/ghc/ghc/-/merge_requests/7442) Norman