Why can Plesk not use an existing user account?

Question

I am using Plesk to administrate my server.

The first thing I want to do is add my domain.

So I click "Add Domain".

Plesk suggests that I use the user account "root".

I go ahead and try to use this.

Now when I want to save my settings, Plesk tells me that "User account root already exists."

Why can Plesk not use an existing account?

Answer 1

You have to add a new username associated with the newly created webspace/domain.