Solution : https://service.sap.com/sap/support/notes/450095 (SAP Service marketplace login required)
Key words : 
system accesses table smobbpmara, back end prices, additional key words, 1st correction instruction 2, 2nd correction instruction, solution implement note 449542, read / implement note 420343, product conditions, filled correctly, report zebp_get_backend_prices
Related Notes : 
       
| 449542 | |
| 420343 | TIP: Backend price transfer in product conditions |