Can't delete Role or Ressource

Hi,

we migrated VMs from Server 2012 to 2012R2 with VMM 2012R2, now we got every Machine migrated this way shown twice in the Failovercluster Manager like you see in the Picture below.(In Hyper-V Manager everything Looks fine).

When I try to delete the Machine I get the Error: "A remote procedure call (RPC) protocol error occured". Also when i try to Use Powershell "Remove-ClusterResource" or "Remove-ClusterGroup" the powershell hangs. Did anyone else get this and maybe knows how to fix this? This Problem is really annonying because it causes additional Problems with VMM.