Saving

Hi I have a problem it's only started today can't seem to save the game anymore more I'm logged in to play and Google and all I'm getting now is login now to enable achievements and device sync i click ok and it's asking me to create a gamer I'D which is weird as I already have one as I've been playing this for ages and spent a lot of money on stuff and I don't want to lose anything it's never happened before and I've been playing this game for ages can anyone help please
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