Thermal Comfort custom sensor platform

Hello,

i currently get the follwoing error notification:

Logger: homeassistant.config
Source: config.py:867
First occurred: 08:12:17 (1 occurrences)
Last logged: 08:12:17

Invalid config for [thermal_comfort]: required key not provided @ data['sensor'][0]['unique_id']. Got None. (See /config/configuration.yaml, line 246).

all i use is in the configuration.yaml

thermal_comfort:
  - custom_icons: true  # global option for the entry
    sensor:
    - name: Wohnzimmer
      poll: true
      temperature_sensor: sensor.temperatur_wohnzimmer
      humidity_sensor: sensor.temperatur_wohnzimmer_2
      sensor_types:
        - absolute_humidity
        - heat_index
        - dew_point_perception

What is wrong?

Thanks in advance
Frank