Move PS4100 Management IPs to new subnet

I need to move the management IP and eth2 (mgmt) on our PS4100 to another subnet.  The eth2 IP is 192.168.34.10 and the Management IP is 192.168.34.9, both of which are on our primary LAN.

The group IP is currently 192.168.200.2 with eth0 and eth1 on 192.168.200.3 and 192.168.200.4. These are connected to a dedicated stand alone LAN for iSCSI traffic and will not change.

What is the proper procedure for changing them?  I'm getting errors that say that "there must be at least one member network interface on the same subnet as the management address" when I try to change them.

Thanks!