[Users] Can't reactivate/destroy NFS domains on ovirt 3.0

Hi, all, I'm happy to get NFS domain added, but somehow, I destroyed one non-master domain (probably clicked twice seeing no immediately response). Then somehow, later on, another non-master NFS domain became master domain, and all 3 NFS domains can't be activated, can't be detached, can't be force destroyed. Error says "master domain not activated". I'm using version V1. Any help ? Regards, -- John Xu