Solution : https://service.sap.com/sap/support/notes/949654 (SAP Service marketplace login required)
Key words :
alm-bapi downgrade kit, wbs element field, account assignment data, relevant correction instructions, terms caufv-proid, bapi_alm_order_get_detail bapi, location data, program correction, caufv-pspel, caufv-pronr
Related Notes :
| 1269322 | Authorization check missing in BAPI_ALM_ORDER_GET_DETAIL |
| 708508 | Downgrade BAPI_ALM_ORDER_MAINTAIN -> errors |