If you run the Capture a payment API for a larger amount than when the payment was accepted, the user's app will be notified of the reacceptance of payment and will need to be approved. However, the Sandbox app does not support app notifications, so please follow the steps below to approve it.
(1) Tap "History" on the Home screen of the Sandbox app.
(2) Tap the target history
(3) Tap "Allow Changes & Pay"
(4) Tap "許可して支払う"