SWIFT：钥匙串中的更新kSecValueData失败

如何解决SWIFT：钥匙串中的更新kSecValueData失败

我正在尝试更新现有钥匙串条目中的密码，但失败并显示以下消息：

无法更新钥匙串中的令牌：传递给函数的一个或多个参数无效。

我可以毫无问题地更新帐户名称，还可以创建钥匙串元素。不知道为什么更新失败。我在MacOs Catalina上使用XCode 11.6。

我们将不胜感激：-）

 // try to update first
        let updateQuery: [String: Any] = [kSecclass as String: kSecclassGenericPassword,kSecAttrService as String: LocalKeychainStorage.KEYCHAIN_LABEL,kSecAttrAccount as String: LocalKeychainStorage.ACCOUNT_LABEL
                                        ]
        let attributes: [String: Any] = [kSecValueData as String: credentials.token]
        let status = SecItemUpdate(updateQuery as CFDictionary,attributes as CFDictionary)

        guard status != errSecItemNotFound else {
            // try to add it,as it was not found
            let addQuery: [String: Any] =  [kSecclass as String: kSecclassGenericPassword,kSecAttrAccount as String: LocalKeychainStorage.ACCOUNT_LABEL,kSecValueData as String: credentials.token]
            let status = SecItemAdd(addQuery as CFDictionary,nil)
            guard status == errSecSuccess else {
                throw LocalKeychainStorageError.keychainAddFailed(status: status)
            }
            print("Add to keystore for \(LocalKeychainStorage.KEYCHAIN_LABEL) successful")
            return
        }
        guard status == errSecSuccess else {
            let errorString: String = SeccopyErrorMessageString(status,nil)! as String
            
            throw LocalKeychainStorageError.keychainUpdateFailed(status: errorString)
        }
        print("Update of keystore for \(LocalKeychainStorage.KEYCHAIN_LABEL) successful")
    }