Cannot revoke the account of Sign in with Apple

Our service has ended and the app has been removed from the App store. This app supported Sign in with Apple, but even if I try to revoke the account from the iOS settings or account.apple.com on the web, but can't delete it and no error is displayed.

Does anyone know the cause of this problem or have encountered it? I'm not sure if it's related, but this app was previously transferred from another organization.

Cannot revoke the account of Sign in with Apple
 
 
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