[Users] Putting a Gluster host into an ISCSI DC

Hello, in a test infra I would to temporarily put a Host that is part of Gluster DC and has gluster volumes active into an ISCSI DC. I put Gluster DC in maintenance, stop glustervolume and put both hosts in maintenance. Then I try to edit host and put into the ISCSI DC. But I receive error Error while executing action: node02: Cannot Edit host. Server having Gluster volume Is there any basic check so that I cannot do this at all? Any tip? Thanks, Gianluca