Losten MFA

Hello, I recently lost a system that had a two-factor authentication key on it. To my misfortune, the file where this key was backed up is 0KB, meaning it was destroyed. Now my question is this. How can I deactivate two-factor authentication, or extract the MFA key from the server to enter it into e.g. Google Authenticator and generate a token. I will add that I have full access to this server physically, and the HA is sitting in virtualization on a ProxMox based server. I have tried many things, but my old methods since the upgrade don’t work anymore. Help…