SAP Message XT006 - Could not create user &1

Diagnosis
User &V1& is created when the Transport Management Systemis configured. This is done using function moduleSUSR_RFC_USER_INTERFACE. An error occurred here:
User: &V1&
Action: &V2&
Exception: &V3&
Meaning of the action:
01 Create
02 Change
03 Read
04 Check
Meaning of the exception:
1 user_dont_exist
2 user_already_exists
3 not_authorized
4 username_required
5 bad_method
6 password_required
7 usergroup_dont_exist
8 bad_time_rage
9 bad_usertype
10 update_error
99 others
The exceptions are explained in the documentation for function
module SUSR_RFC_USER_INTERFACE.

System Response
The function terminates.

Procedure
Correct the error and repeat the configuration of the TransportManagement System.