Adding a second (split) Sonos system in my HA

Hi,
I have two separate Sonos systems (both S2). I have successfully set up one Sonos system in Home Assistant, but when I try to add a second one, it says “Already Configured. Only one configuration possible”

Each Sonos system is on their own VLAN. Currently, nothing is blocking network traffic between these VLAN’s, although multicast/mDNS is not going through.

Is there a workaround so I can control both systems in HA?

Did anyone try this before?