Solution : https://service.sap.com/sap/support/notes/814695 (SAP Service marketplace login required)
Key words : 
log by2=> sql error -55555     performing exe        [dbacds#2637] [dbacds  0637 ], log by2=> sql error -55555     performing exe        [dbds#2 @658] [dbds    0658 ], sapbwnews bw support package 11 netweaver'04 stack 11, &+       abap location info 'saplrsdu_sql', delete existing database locks, 10 content            import support package 20, 0b            import support package 26, error message appears, log by0=> dsql_db6_exec_immediate, [dbds#2 @ 658] [dbds    0658 ]
Related Notes : 
       
| 763338 | SAPBWNews BW Support Package 11 NW'04 stack 11 RIN | 
| 723262 | SAPBWNews BW 3.1 SP Content 20 | 
| 723257 | SAPBWNews BW 3.0B Support Package 26 |