Hello team

I'm facing a problem adding a user and I would like to know if you have already faced this problem.
I am filling in all the mandatory data, but when trying to save it is showing the message:
Login ID __________________ is not available

Has anyone experienced this problem?
Note: I have already consulted the ID that I am trying to create and it does not exist, I put it in the search for the status to be searched (EVERYTHING).