WTH: Not all statistics can be fixed, why?

Does anyone know why not all statistics are editable?
I have a temp sensor that weirdly report a temperature of -1.4 million degrees (I’m fairly certain that’s scientifically impossible!).

In the Dev tools > statistics page a great deal of my statistics have the ski ramp arrow iconimage, but none of my temperature sensors have them.

Is this a mistake on my end, or a weird limitation?

Thanks all in advance

ps:/ ive searched for this and I cant see a similar thread

You can only adjust statistics for sensors with state_class: total_increasing (or total) not measurement.

Thanks Tom.

For anyone else wanting to find a fix for this I’ve made a quite write up here: