Solution : https://service.sap.com/sap/support/notes/592348 (SAP Service marketplace login required)
Key words :
abap data dictionary solution similar, create index sql statement, reverse scans' extra, importing support packages, importing support package 19, create table, terms ddstorage, 'cluster' addition, database status, generally created
Related Notes :
| 605752 | DB6: Unexpected token ALLOW REVERSE SCANS |
| 594287 | DB6: Corrections to the primary index of fact tables |