To solve your issue, you'll first need to log out from the game via the in-game settings. Make sure your account is linked before following this procedure:
- Open the game and go to the home screen.
- Click on the "Options" menu at the top right of the screen.
- Select the "Account Settings" tab
- Click on the "Logout" button and click on "Confirm"
After this, clear your cache:
- Go to device setting > App > Guardian Tales
- Select Storage > Clear Cache > Clear Data
- Restart your device.
- Re-download the game.
- Hold the power button until "Slide to Power off" displays and turn it off.
- Hold the power button until your device opens again.
- Uninstall the game, clear your cache and re-download the game.