Solution : https://service.sap.com/sap/support/notes/1579936 (SAP Service marketplace login required)
Key words : 
request type lock account, terms access request 2010, access request, lock account, access management, unlock account, delete account, symptom create, existing assignment, existing assignments
Related Notes : 
       
| 1591123 | Master Note for SAP Access Control 10.0 - Support Pack 5 |