Solution : https://service.sap.com/sap/support/notes/86447 (SAP Service marketplace login required)
Key words : 
additional key words fiincon, option 'documents/transaction figures', unfavourable circumstances fi document, affected fi documents, execute report sapf190, fi document numbers, transaction figures, fi document, report sapf190, document numbers
Related Notes : 
       
| 175047 | Causes for FI document number gaps (RF_BELEG) | 
| 79965 | No balances in parallel loc. currency, documents ok | 
| 74963 | Double update in invoice verification | 
| 74096 | SAPFF001 & LFACIF05: F5302 document is locked |