SD6SF1M256G1022 firmware????

Recently installed a Sandisk mSata SD6SF1M256G1022 - the temperature reports as 71 deg C!!! Obviously wrong so I tried to find a firmware update but the device does not seem to exist. No results on the Sandisk website, the SSD toolkit says “No firmware information for this device” and google gets no info either. The current firmware version is X231200. It was purchased through reputable business channel and I have seen it for sale on several legit websites so I assume it is not a knockoff. Anyone know what the situation is?

I guess nobody out there knows anything about this???