Remove one device from Gree Climate

Hello,

we use Gree Climate intergration to controll our units.
It disovecerd the units and all works fine. One unit got broken so it was replaced. New unit was discovered.

But how can I remove the old unit which does not exist anymore in network. It’s still listed in devices as “not avaiable”. There is no option to delete only this one unit.

thnaks