To protect your game progress from being lost, please bind your account with a Google Play or Facebook account. Click on your avatar→Settings→Account→Account Management, and chooseGoogle Playor Facebook to bind your account.
Please note: AGoogle Playor Facebook account can only be bound with one game account. Therefore please check whether yourGoogle Playor Facebook account has already been bound with another King of Avalon game account or not before you bind it to your game account.