Solution : https://service.sap.com/sap/support/notes/175431 (SAP Service marketplace login required)
Key words : 
dfreg obart konty lfdnr efeld             fdnam        fdinh------------------------------------------------------------------------pp1   apo   mat   006   cobrb-kdauf       afpod-kdaufpp1   apo   mat   007   cobrb-kdpos       afpod-kdpospp1   apo   mat   008   cobrb-ps_psp_pnr  afpod-projnpp1   apo   psp   001   cobrb-perbz                    gespp1   apo   psp   002   cobrb-prozs                    100pp1   apo   psp   003   cobrb-ps_psp_pnr  afpod-projnenter 'tkb2c', table tkb2c, additional key words co10, automatically generated settlement rule, choose 'create entries', -valuated project stock, valuated project stock, project stock, order settlement, warehouse stock
Related Notes : 
       
| 160209 | Manufacture of co-products: settlement rule | 
| 156597 | Joint production and sales order/project reference |