HA 2025.3.1 mqtt error on co2 sensor

[mkampstra]

With the HA update 2025.3.1 there was an error issued on my yaml config for Duco

The device class "temperature" is not allowed in combination with the unit of measurement CO2

I could not find the right device class.
My quick solution was to set # in front of device class for the CO2 sensor. Now the configuration error is cleared.