Try to delete (or comment it with a #) lines that stars with count: There was a breaking change some release ago (I don’t remember which one but I’m sure). Give a try.
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In the end, the error was due to the fact that I had not yet put anything inside “beta.yaml”
Copying “alpha.yaml” to “beta.yaml” and then changing the name and id of the sensors at the code level works fine.
So it can be done as I described.
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