外部キー管理の設定を削除できません

環境

• ONTAP 9.6+
• 外部キー管理ツール
• HWU- ドライブモデルが暗号化されたドライブかどうかを確認します

問題

• 次のエラーが原因で外部キー管理の設定を削除できません

cluster::*> security key-manager external disable -vserver <vserver-name>

Warning: This command will permanently delete the external key management configuration for Vserver "cluster".
Do you want to continue? {y|n}: y

Error: command failed: Cannot remove key management servers that still contain one or more NSE authentication keys. Use "security key-manager key query -vserver
    cluster -key-server x.x.x.x:5696 -key-type NSE-AK" command to find out these keys, and then delete them with the (privilege: advanced) "security
       key-manager key delete" before trying to remove the key management servers again.