This object reports the reason code, using the RSAKeyErrorCode textual convention, for why configuring an RSA peer public key most recently failed. Admins check it after an attempted peer-key configuration fails, since it is accessible-for-notify and typically surfaces via an associated trap. For example, an admin who cannot add a peer's public key would consult this object's value to see whether the failure was due to a malformed key or another specific error.