How to configure Multi-Seat on Linux with KDE-Wayland?

I am trying to configure dual-seat on my Linux with KDE-Wayland. I have two graphic cards which should make it possible. I configured an /etc/udev/rules.d/72-multiseat.rules

# Assign second graphics card to seat1
SUBSYSTEM=="drm", KERNEL=="card1", TAG+="seat", ENV{ID_SEAT}="seat1"

# Assign Logitech K120 keyboard to seat1
SUBSYSTEM=="input", ATTRS{idVendor}=="046d", ATTRS{idProduct}=="c31c", TAG+="seat", ENV{ID_SEAT}="seat1"

# Assign Logitech Logi Bolt Receiver (mouse) to seat1
SUBSYSTEM=="input", ATTRS{idVendor}=="046d", ATTRS{idProduct}=="c548", TAG+="seat", ENV{ID_SEAT}="seat1"

Then applying the configuration: sudo udevadm control --reload-rules sudo udevadm trigger Unfortunately, after this login into KDE is not possible anymore, for either seat. ----------------- How to configure multi-seat (several users at the same time) on Linux with KDE-wayland?