Continuation of this issue from 3 years ago
I had a user with two accounts
I deleted the google-auth provider account, but now when I tried to change the email account from fakename@hotmmail to firstname.lastname@example.org I get an error
Error! The specified new email already exists
Searching users for “email@example.com” returns zero results
It seems after you delete a user account, auth0 still remembers the email and therefore blocks you from added the account again. So now I have to tell my customer: sorry, I can’t fix this. You can’t use our service anymore.