l1tech

I recently installed this in my vehicle. 1st thing I was going to do was update the firmware. The firmware that is in the radio is 8.40 however Pioneer lists the latest firmware as 8.31. I would just leave it however I am having an issue with SiriusXM where it will not display the channel list on the radio but everything else with the sat works perfectly. Does anyone have any ideas what is up with the firmware that is currently in my radio?