Can't merge branches

Hello everyone,
I’ve got this error while merging develop into master

I think it’s happend when my colleague exported repo and placed it in another gitlab project. There was an open merge request. Now I can’t see this !1 merge request so I can’t close it. What should I do in this situation?

Symlis

Ok, nevermind, it turned out that this open merge request was in “merge request list” so I just merged it in there