Solution : https://service.sap.com/sap/support/notes/184392 (SAP Service marketplace login required)
Key words : 
additional key words sd_sales_item_maintain, enter item partners, item partner check, partner group, program rvinvb10, sd document, report rvinvb10, solution implement, attached correction, incorrectly
Related Notes : 
       
| 116195 | Manual addresses in SD BAPIs |