Hi Smeags,

Thanks for the question. It's not possible to disconnect your old club from your Facebook I'm afraid. If your current club that you've just started isn't connected to Google Play/Game Center and you try to connect that Facebook account, access to the current new one will be lost. :/

Connecting your new club account to Google Play/Game Center will allow for your progress to be saved and for you to play across multiple devices.

Hope this helps.

SausyFC