[ovirt-users] Error while executing action: Cannot add Host. Host with the same UUID already exists.

Hello List, i am using oVirt Engine Version: 3.5.2.1-1.el6. I would like to remove a node from a GlusterFS Cluster and use it for local storage. So i put my node into maintance. Reinstalled it freshly with CentOS7. Now i would like to add it to a New Cluster with local storage, but i get: Error while executing action: Cannot add Host. Host with the same UUID already exists. How can i resolve this problem? I can NOT remove my old host from the Gluster: Cannot remove Host. Server having Gluster volume. Thanks, Mario