Solution : https://service.sap.com/sap/support/notes/1080969 (SAP Service marketplace login required)
Key words :
FP-REQ, FKKORD1, FKKORD2, FKKORD3, PSCD-REFX, FP-EVENT-6500
SAP Note 1080969 - Event 6500: System does not transfer field changes
Component : Contract Accounting -