Solution : https://service.sap.com/sap/support/notes/1041694 (SAP Service marketplace login required)
Key words : 
incorrect debit/credit indicators, debit/credit indicator 's', negative local currency amount, transaction currency amount 0, relevant support package, symptom due, document splitting, posting keys, posting key '40', terms shkzg
Related Notes : 
       
| 1484185 | Document splitting: Incorrect posting key in New G/L | 
| 1434835 | Incorrect posting key in new general ledger | 
| 1383862 | Document splitting: Incorrect posting key in New G/L | 
| 1085921 | Document split |