Unique IDs for entities in configuration.yaml for Alexa integration

Configuration Frontend
1

I want to use the stuff I added to my configuration.yaml to be available in alexa and google assistant as well. but when I try to enable it for these through the UI, I get the notification that the entity has not unique ID and hence cannot be edited through the UI. I’ve searched around for quite some time but could not find a way to bring those devices to alexa.

for example these groups. work fine in home assistant, but can’t get them into alexa.

group:
  schlafzimmerfenster:
    name: Beide Schlafzimmerfenster
    entities:
      - cover.schlafzimmerfenster_links
      - cover.schlafzimmerfenster_rechts
  Alle Fenster:
    name: Alle Fenster    
    entities:
      - cover.schlafzimmerfenster_links
      - cover.schlafzimmerfenster_rechts
      - cover.badezimmerfenster
  Heizungen:
    name: Alle Heizungen
    entities:
      - climate.workingroom_thermostat
      - climate.bathroom_thermostat
      - climate.livingroom_thermostat