Solution : https://service.sap.com/sap/support/notes/486103 (SAP Service marketplace login required)
Key words : 
function call 'fmco_update' / programm lfmprf02, attached source code corrections, logistics invoice verification, ps cash management, document header, parked document, transaction mir7, posting year, form doc_post, data records
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| 480052 | |
| 379125 | FV60: FI057 "System error:..." in FI Enjoy parking | 
| 378178 | (FI) Changing parked document as regards posting year | 
| 178958 | |
| 175047 | Causes for FI document number gaps (RF_BELEG) |