Solution : https://service.sap.com/sap/support/notes/1490285 (SAP Service marketplace login required)
Key words : 
system responseto avoid duplicate data records, software component   sap_bw                        business inform, procedureto avoid duplicate data records, transaction snote sap netweaver bw 7, source combination/target combination, remote data transfer processes, duplicate data reason, data transfer process, data record reaches, sap netweaver bw 7
Related Notes : 
       
| 1471463 | SAPBWNews NW BW 7.01 ABAP SP08 | 
| 1468668 | SAPBWNews NW7.0 BW ABAP Support Package 25 | 
| 1450990 | SAPBWNews NW BW 7.02 ABAP SP05 | 
| 1392433 | SAPBINews NW7.11 BW ABAP Support Package 05 |