Pretty straight forward. I have had a rule for some time that runs that turns on and off my lights for my pantry. The On action uses a hub variable to set the light level in the evening. Nothing has changed but it recently started saying the hub value is invalid.
That's because 75 is not a valid color temperature. Color Temperatures run 1500 to 9000, and some from 2700 to 6000. So the rule is range checking the variable value and warning you that it is out of range.
So I already thought of that and when recreated as a 5.1 rule it doesn't appear to have the same issue. This is a rule I have had for a while so it is using 5.0. this creeped up in another rule i found with a variable as well. Both have been recreated today. What is strange though is they were working fine.