Tado X is already present in Homey, but not visible

I am trying to pair the Tado X Thermostat with Homey. However, Homey indicates during the pairing process that the device is already added. This is not the case, as I cannot find the device.

The Tado X Thermostat is working fine in both the Tado app and the Apple Home app. The Tado X is connected to the Tado X Bridge.

Who knows what I need to do to get the Tado X paired with Homey?