[Users] How do you move an host with local-storage into "regular" Data Center?

Hi all, I need your help to clean up my DataCenter. I'm new to this wonderful product so I'm exploring to understand what's offered. I'm talking about 3.4.0beta3 (Centos 6.5). In the beginning it was a "normal" system with two hosts, an iSCSI storage, and the engine installed as a "regular" KVM guest on another host (external to the oVirt setup). So far so good. Then I selected one of the two hosts, put it in maintenance mode, clicked on "Configure Local Storage", accepted the defaults for "Data Center", "Cluster" and "Storage", put in an appropriate path to local storage... Now I have another DC (hostname-Local), another Cluster (hostname-Local) and another SD (hostname-Local). This host has been migrated from the original Cluster and it is now in the "hostname-Local" Cluster. Nothing to regret, I was expecting something like that. Obviously I have now a single host in my "main" DC and so I'm unable to do migration of VMs and so on. After some tests I decide to go back to the original situation. I put again the host in maintenance mode, "Edit", select the correct DC and the host is now back in his place. Now I try to remove the spurious DC to clean-up the situation but the result is an error popup: "Error while executing action: Cannot remove Data Center. There is no active Host in the Data Center." OK, I move again the host in. But now when I select the DC the "Remove" button is obviously greyed out. Well, for the moment I'm happy to move again the host into the regular DC to gain full functionality of my cluster but I would like to clean my setup removing the other, useless, DC. Does anyone know how to get out from this? I'm probably missing something obvious but here I'm stuck. TIA, Giorgio.