I am trying to add a user in CRM within CRM Plus and I get a message that the user is already part of a different CRM account. How can I add this user in CRM?

I am trying to add a user in CRM within CRM Plus and I get a message that the user is already part of a different CRM account. How can I add this user in CRM?

A user can be part of only one CRM account. To add this user, the user has to close his/her CRM account. After the account is closed, you can add this user in CRM.