Solution : https://service.sap.com/sap/support/notes/762423 (SAP Service marketplace login required)
Key words : 
supplier relationship management->srm server->master data-> define external web services, terms upgrade srm 4, source version incorrectly, attached correction instructions, imported support package 3, start xpra bbp_z010_catalogs_xpra500, external catalogs, srm release 3, srm release 4, support package 3
Related Notes : 
       
| 975861 | Add. Info.: Upgrade to SAP SRM Server 6.0 ABAP | 
| 961513 | Add. Info.: Upgrade to SAP SRM Server 5.5 SR2 ABAP | 
| 705578 | Additions to upgrade on SAP SRM Server 5.0 |