Solution : https://service.sap.com/sap/support/notes/117303 (SAP Service marketplace login required)
Key words :
additional key words billing plan, symptom update termination duprec, header billing plan, item billing plans, function module billing_schedule_save, execute report rvfpla01, insert fplt, program saplv60f, sales order, fpla-horiz
Related Notes :
114313 | No horizon extension in the header billing plan |
106006 | Tax increase with billing plan |