Lost progress due to update (Xbox1)

Well, i decided to do 50 laps of the Goliath circuit. Bad idea. I got to lap 40, put the controller down and rested my eyes for 10 minuets. I come back to find the game closed and prompts for an update just after midnight on October 11th. Why was this update compulsory and is there any way of getting my 6 hours of my life back? I am a busy person and made time for my 50 laps of the Goliath. Due to my circumstance i will not get another chance at this for a very long time so this has annoyed me a fair bit. Apologies for the rant, i just basically wasted my day off.