Solution : https://service.sap.com/sap/support/notes/449943 (SAP Service marketplace login required)
Key words : 
additional key words invoice deduction, financial accounting document display, financial accounting notes, incoming paymentsanother symptom, document change rules, document change subsequently, basis support package 22, invoice deduction, document change, /3 support package 20
Related Notes : 
       
| 449847 | IS-H DE: Belegänderung bei Zuzahlungen m. Re.absetzung | 
| 449479 | IS-H DE: Belegänderung bei Zuzahlungen m. Re.absetzung | 
| 449399 | FB03: Authorization error on line (ALV, 4.6C) | 
| 427950 | FB03: Various errors in FB03 after importg SP 20-22 in 4.6C |