Solution : https://service.sap.com/sap/support/notes/204559 (SAP Service marketplace login required)
Key words : 
additional key words wpubon, message type wpubon, cash register receipts, attached advance corrections, prerequisites solution implement, implement notes 191467, pos monitor, billing document, material document, posted data
Related Notes : 
       
| 437863 | |
| 326185 | |
| 325365 | Correction of incorrectly posted POS IDocs | 
| 191467 | |
| 159859 |