Solution : https://service.sap.com/sap/support/notes/1027055 (SAP Service marketplace login required)
Summary : 
      During an update to Netweaver 7.0 SP 11 from SP 8 or earlier versions, deployment failures of sap.com/caf~eu~gp~ui~dt~comp occur due to duplicate Web Dynpro components detected by a new repository content check. Specifically, sap.com/caf~eu~gp~ui~dt~comp and sap.com/caf~eu~gp~ui~dt~comp~cons Development Components (DCs) share the same application names in earlier service packs. The issue, impacting the software component SAP-EU, can be resolved by undeploying the sap.com/caf~eu~gp~ui~dt~comp~cons DC.
Key words : 
/caf~eu~gp~ui~dt~comp~cons development component, /caf~eu~gp~ui~dt~comp~cons dcs, /caf~eu~gp~ui~dt~comp, software component sap-eu solution undeploy, sap-eu software component, duplicate web dynpro components, deploy service returned error, deploy application      sap, web dynpro repository, duplicate repository content
Related Notes : 
       
| 891983 | JSPM: Central SAP Note SAP NetWeaver 7.0 AS Java |