I did have a controller on Node 29 a while back, I recall I needed to change the node in the association group one for each device. Only cautions are that I only had one controller and most devices only allow one device in Group 1 most are default in the ZW DB as Controller. Going from memory, in the advanced tab for the Controller there is a parameter for SIS_node and that needs to be changed.
I know there can be secondary controllers but haven’t played around with that. As unwanted unsolicited advice I have split the home ZW into three zones, but each is on its own Rpi and connected either via Mqtt or remote OH binding (Rpi3b-Aeotec5, Rpi4-Zooz-ZSt10 and Rpi5-Zooz- ZST39)
Lastly when I first saw your post I was concerned about this issue. It has been addressed in the OH5.0 snapshots, but not yet in a stable version.