Solution : https://service.sap.com/sap/support/notes/153741 (SAP Service marketplace login required)
Key words : 
additional key words s067-olikw, sales information system, open delivery values, sales documents, open quantities, credit management, mcvbap-olikwau, billing plan, program error, incorrect data
Related Notes : 
       
| 436450 | Statistics: Open net value is missing for billing plan | 
| 378398 | Credit update for down payment requests | 
| 204130 | SIS update: Collective note | 
| 174141 | SIS: Collective note - Customizing | 
| 137148 | SIS reorgnzn:Billing doc., down payment clearings | 
| 133156 | Credit exposure is incorrect for down payments | 
| 120263 | Down payment clearing writes sales volume to SIS | 
| 111211 | Credit exposure incorrect for down payments |