Solution : https://service.sap.com/sap/support/notes/1017740 (SAP Service marketplace login required)
Key words :
alm bapi downgrade kit, plant maintenance order, bapi_alm_order_maintain bapi, bapi processing, service order, user status, transaction iw32, parallel mode, system issues, error message
Related Notes :
| 735703 | User status is not changeable after technical completion |