10000989 
Message
You must remove the licenses assigned to [username] before deleting this user
Diagnosis
You have opened the User — Setup window and have tried to remove a user, but licenses have been assigned to that user. You cannot remove a user who has licenses assigned.
Procedure
Choose
Administration 
License License Administration 
.In the License Administration window on the Allocation tab, navigate to the user whose status you want to remove.
Deselect all checkboxes in the Used column.
Choose the Update button, then choose the OK button.
Choose
Administration Setup General Users .In the Users — Setup window, navigate to the user you want to remove.
Select the user, then right-click anywhere in the Users - Setup window.
Choose the Remove button, then choose the User button.