RM online migration fails with duplicate role id specified

Hi all,

While testing migrating our live data from 3.0.1.3 to 4.0 I've hit an error while performing the RM online migration.

       ---Start entity---
        Error 500
        Duplicate permissions role id specified: testLead

        com.ibm.team.process.common.service.ProcessDataValidationException: Duplicate permissions role id specified: testLead
                at com.ibm.team.process.internal.common.util.ProcessValidationUtil.validatePermissions(ProcessValidationUtil.java:304)
                at com.ibm.team.process.internal.common.util.ProcessValidationUtil.validateTeamConfiguration(ProcessValidationUtil.java:236)
                at com.ibm.team.process.internal.common.util.ProcessValidationUtil.validateProcessSpecification(ProcessValidationUtil.java:96)
                at com.ibm.team.process.internal.service.DefaultProcessDataValidator.validateProcessData(DefaultProcessDataValidator.java:130)
                at com.ibm.team.process.internal.service.DelegatingProcessDataValidator.validateProcessData(DelegatingProcessDataValidator.java:74)
                at com.ibm.team.process.internal.service.ProcessService.validateProjectAreaPostSave(ProcessService.java:2946)
                at com.ibm.team.process.internal.service.ProcessService.validatePostSave(ProcessService.java:2499)
                at com.ibm.team.process.internal.service.ProcessService.doTransactionalSaveProcessItem(ProcessService.java:1873)
                at com.ibm.team.process.internal.service.ProcessService$6.run(ProcessService.java:1781)
                at com.ibm.team.repository.service.internal.PrimitiveTransactionService$3.run(PrimitiveTransactionService.java:168)
                at com.ibm.team.repository.service.internal.rdb.RepositoryDatabase.runTransaction(RepositoryDatabase.java:321)
                at com.ibm.team.repository.service.internal.rdb.RepositoryDatabase.runInTransaction(RepositoryDatabase.java:245)
                at com.ibm.team.repository.service.internal.PrimitiveTransactionService.runInTransaction(PrimitiveTransactionService.java:102)
                at com.ibm.team.repository.service.internal.PrimitiveTransactionService.runInTransaction(PrimitiveTransactionService.java:97)
                at sun.reflect.GeneratedMethodAccessor380.invoke(Unknown Source)
                at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
                at java.lang.reflect.Method.invoke(Method.java:600)
                at org.eclipse.soda.sat.core.internal.record.ExportProxyServiceRecord.invoke(ExportProxyServiceRecord.java:361)
                at org.eclipse.soda.sat.core.internal.record.ExportProxyServiceRecord.access$0(ExportProxyServiceRecord.java:347)
                at org.eclipse.soda.sat.core.internal.record.ExportProxyServiceRecord$ExportedServiceInvocationHandler.invoke(ExportProxyServiceRecord.java:56)



I did a search and came accross this thread: https://jazz.net/forum/questions/25598/crjaz0656i-error-migration-completed-with-errors which is quite old but lead me to thinking I could fix it by editing the XML source of the RM project.
However, adding the rm repository into the RTC eclipse client fails with an error saying that the server is older that the client so I'm a bit stuck.

Has anyone seen this before / know how to resolve it?

Many Thanks,

Robin