If you are unable to update the game at the Store, please try following the steps below. 

■ App Store

1. Enter App Store > Select profile located in the upper right corner > Check [Upcoming Updates]

2. [Settings] > select your profile > [Media & Purchases] > [View Account] > [Manage Payments]

3. [New Payment Method] > [Add Payment]

4. Restart your device and access App Store > Download or Update App

※ If you play the game with a guest account, all saved game data can be reset once you clear data & cache.

Please make sure your game account is linked before following the steps above.