How to delete Employee assignment in t-code Users_GEN SRM 7.01

Hi Gurus,

I am trying to assignthe user in the Purchasing org by using the t-code "Users_Gen" and receiving the below error message in SRM 7.01. In SRM
5.0 we are able to delete the employee assignment (By using the option Delete user Accounts and Employee )and then able to assign the user to the appropriate purchasing org without any issues. But when I tried in SRM 7.01 to delete the employee assignment & we don't have the option to delete the employee assignment( It have the option to delete the user and employee assignment completely).

Error during creation ofuser: XXXXX User not created or error(s) occurred during user cre"Central person"

already exists for  user XXXXX ( E BBPU_MESSAGES042 )

Also I have verified forthis user and found that the central person in PPOSA_BBPand found that he has BP number but when I select this it does not have any entries.

Could you please suggestme how to fix this. Your help will be greatlyappreciated.

Regards,

Sada