Open Kleopatra
Go to Settings
Open Configure Kleopatra
Select Smartcards
Find the passkey or key entry you want to remove
Delete or remove the key from the smartcard if it is stored there
If the passkey is tied to a certificate, revoke or delete the certificate from Kleopatra
If the passkey is saved in the Windows Hello or system authenticator, remove it from the operating system’s passkey settings
Restart Kleopatra
Verify the passkey no longer appears in the key list