Solution : https://service.sap.com/sap/support/notes/865220 (SAP Service marketplace login required)
Key words : 
sapbwnews bw support package 14 netweaver'04 stack 14, 10 content            import support package 22, 0b            import support package 28, 50            import support package 14, 1 content support package 22, runtime error reason, provide advance information, 0b support package 28, itab_duplicate_key dump occurs, db6 database error
Related Notes : 
       
| 763340 | SAPBWNews BW Support Package 12 NetWeaver'04 Stack 12 RIN | 
| 723263 | SAPBWNews BW 3.1 Content Support Package 21 | 
| 723258 | SAPBWNews BW 3.0B Support Package 27 |