I installed an app that stores a persistent identifier in the iOS keychain, even after uninstalling and reinstalling it. This really bugs me. Is there a way to delete said app's data from the Keychain, or worst-case resetting the entire iOS Keychain, without resetting the device completely?

Note: I'm not talking about the iCloud Keychain, but the on-device keychain that apps can store small bits of data in.

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