We recommend Guardians to use 'link account' feature,

if Guardians want to play Guardian Tales with SNS account,

previously played with guest account.

You can check the Account Settings by clicking the Config (gear-shaped) button in the right upper corner of the game screen.

By clicking the 'Link Account' button,

you can link your guest account to the SNS account.

However, please note that you can't link your guest account

to the SNS account which is already linked by another game data

or which was used when pre-registration event.