The item already exists.
- iOS 2.0+
- macOS 10.2+
- tvOS 9.0+
- watchOS 2.0+
The system considers an item to be a duplicate for a given keychain when that keychain already has an item of the same class with the same set of composite primary keys. Each class of keychain item has a different set of primary keys, although a few attributes are used in common across all classes. In particular, where applicable,
k are part of the set of primary keys. The additional per-class primary keys are listed below:
For identity items, which are a certificate and a private key bundled together, the primary keys are the same as for a certificate. Because a private key may be certified more than once, the uniqueness of the certificate determines that of the identity.