Hi experts,
During maintanence and adjustment of our HVAC the power was turned off. When the power came back on the HVAC system created a couple of measurements at around -350 degree Celsius. This prevents making any useable graphs. I have been searching the web for any help regarding editing the historical data, but none of the topics that I found came up with a useable solution. The sensor/recorder doesn’t have the ramp symbol. I don’t have any experience writing any commands to correct the data, so if there is a tutorial or an add-on in Hass making it possible to edit the data in a datasheet like excel that would be the easiest to go to solution for me.
If the only solution is to write a command how would that look like? 
br Jason