Solution : https://service.sap.com/sap/support/notes/511340 (SAP Service marketplace login required)
Key words : 
terms function group   = oiu_va_allocate_volumesfunction module  = oiu_va_handle_load_oil_invtransaction      = o3u_rqst reason, ~ftp/specific/isoil/46b/notes/note, ~ftp/specific/isoil/46c/notes/note, wrote extra load oil inventory rows, volume allocation involving load oil, load oil inventory existed, load oil inventory, -mine-specific note, reducingthe sales volume, alsocauses calculated production
Related Notes : 
       
| 604639 | IS-OIL / IS-MINE: CRTs 48-51 for SAP_APPL Support Packages | 
| 542507 | IS-OIL / IS-MINE: CRTs 41-43 for SAP_APPL Support Packages | 
| 520503 | IS-OIL / IS-MINE: CRTs 38-40 for SAP_APPL Support Packages | 
| 512081 | IS-OIL / IS-MINE: CRTs 29-30 for SAP_APPL | 
| 387861 | Order of IS-OIL / IS-MINE 4.6C Notes (SAP_APPL) | 
| 312430 |