Solution : https://service.sap.com/sap/support/notes/539720 (SAP Service marketplace login required)
Key words : 
/1cn/cbpsap118 master data table, free-text items, additional expense incurred, avoid repeatedly changing, obsolete abap pricing, solution 'simplified pricing, price data, product master, simplified pricing, symptom pricing
Related Notes : 
       
| 1266771 | SRM 7.0 Performance Guide | 
| 1169088 | SRM 6.0 Performance Guide | 
| 622282 | EBP 3.5 - price is lost in the Shopping Cart | 
| 593109 | Short dumps UNCAUGHT_EXCEPTION in SRM 2.0 (EBP 3.5) |