Can't reprepare a cluster in VSM network virtualization

Hi,

In VSM, my network virtualization preparation wasn't good, so I unprepared my cluster. But now when i want to reprepare my cluster, i have this error message in VSM : "Cluster domain-c154 already has been configured with a mapping" .

I already tried to restart my hosts in the cluster, but still the same problem.

If you have any idea ?

Thanks for your help !