Two Player Career Stuck

I was playing a two player career Singapore GP when my friend, who had crashed out at that point and had been spectating for about 8 laps, had to leave and left the game. When I finished the race it said that updates were conflicting and now whenever we try to load in together it just gets stuck on the 'Round 12 - Singapore - Race' screen. It then goes black for one second before popping up that screen again. It also pops up at the top saying 'Starting 00:00" for about a second before disappearing and popping up again after it goes black again. I am on PS5 and he is on Series X. How do I recover this?