export domain not importing

Hi,

I have a NFS based export domain and this was created and used on a rhev server to import a few virtual machines from other KVM and vmware servers.

I have since rebuilt the entire rhev hypervisor and rhev-manager and when trying to import the export domain it says:

This export domain is being used by another datacenter

When I try and re-import it - it tells me that it is already configured on the system...

How do I clear it and re-import it ?

Thanks