Allow the same SSH key to be used across accounts

Summary

I have removed all my SSH keys. So there are no ssh keys registered. I now try to add a new SSH key but get there following error:

In cases where the SSH key is in use across another account, users are not able to use it. This could happen when a user has a work account and a personal account, but wants to share the SSH key across both.

If they try to reuse the key, they will see an error message that the key can't be added because the fingerprint has already been taken.

What is the expected correct behavior?

The key should be added.