Email already exit, HR add new user

Hello,
I have create job application and accept the new employee, But when I click on create user then click validate


i got error, email already exit.

Hi Oman, I’m on 16.0.2
I already have several users with the same email working on purchase orders. But now when I try to create a new one using the same email it gives me the same message. Email already exists.
have you found a solution or a way around that?
Thank you