Solution : https://service.sap.com/sap/support/notes/1414583 (SAP Service marketplace login required)
Key words : 
software component   crmuif                        sap crm uif, import webclient ui configurations, insert sequence failed due, conflicting unique indexes, relevant support package, manual implementation steps, manual pre-implement, database table bspc_dl_xmlstrx2, table bspc_dl_xmlstrx2, system issues
Related Notes : 
       
| 626915 | Transport problems with tables with a unique index |