Same thing happened to me but with a project with ID brave-watch-314519. I have never seen this project in my life, it has suddenly appeared under my projects, I have no permission to do anything with it including leaving, shutting down or deleting it, so I'm stuck with what appears to be somebody else's project. This happened by the way after shutting down one of my projects that are actually mine. Could someone from Google Cloud Support help with this? Seems like a pretty big flaw!