Solution : https://service.sap.com/sap/support/notes/1168850 (SAP Service marketplace login required)
Key words : 
table contract price contract id contract item id lower bound item category increasing, /tc~mdm~srmcat~uiutil/utilitiesto connect, /installmdm mdm data management reference guide 5, contract item id, contract price table perform, solution starting srm-mdm catalog 2, srm-mdm catalog standard delivery, mdm data manager adjust validations, table contract price, loosing data manually rebuild
Related Notes : 
       
| 1231997 | SRM-MDM Catalog 2.0 SP03 Patch05 Release Note | 
| 1171710 | SRM-MDM Catalog 2.0 Repository information |