I've got an old Clash Royale save game on Google Play Games that I would like to overwrite. Most games will let you do this but for some reason Clash Royale won't let you do that. How can I overwrite this with my current save game. And I don't want to use Facebook, only Google Play.
EDIT: Heres a better explanation:
I've got a save game on my GPG Account. But I've got my current game on my device, not connected to my GPG Account. I would like to put my current game onto Google Play, and delete my old game.