Solution : https://service.sap.com/sap/support/notes/750074 (SAP Service marketplace login required)
Key words : 
changed currency exchange rates, 1 content            import support package 17, 0b            import support package 23, currency translation reason, 5            import support package 05, 1 content support package 17, 5 content support package 05, 0b support package 23, 0b support package 22, 1c support package 16
Related Notes : 
       
| 822302 | OLAP CACHE for remote providers | 
| 790818 | Currency transl. (conversion to target curr.); incorr. date | 
| 789691 | Changed exchange rates are not drawn | 
| 730236 | |
| 723259 | SAPBWNews BW 3.1 Content Support Package 17 | 
| 723192 | SAPBWNews 3.0B Support Package 23 | 
| 693495 | SAPBWNews BW Support Package 05 NW'04 Stack 05 RIN | 
| 643514 | Currency upload from file: Invalidate OLAP cache | 
| 621613 | Currency upload: Invalidating OLAP Cache BW3.0B/3.10 SP13/07 |