Add MQTT History Graph to Room in Dashboard

Hi all,

I´ve added some History Graphs in my Dashboard for Room Temperature and Humidity.
In my Dashboard I see all my Rooms and the available devices for example:
Bedroom:

  • Light Bedroom
  • Cover Bedroom

Now I want to add the History Graph to that view of Bedroom but I don´t manage to achieve this.
I´ve tried to add the Zone on entities but I´m not able to change anything since I´m getting the message “This entitie has no unique ID…”

Anyone a tip for me?
Thank you!