We’ve rolled out a new security protocol and suggested some workarounds. Can you create a new account with your work email using a suffix, such as username+suffix@company.domain? The suffix could be something like +admin1, for example.
If this works for you, we recommend:
Creating a couple of Super Admin users in your org.
Make sure all admins are registered for MFA.
In addition, follow this guide, Enable Terraform access for your Okta org, to make sure you have access to a Terraform config in the event you are locked out.