I've spent the last 3 hours trying to fix it Takitdown. It won't work though. I think I do know how to make it work, but it would literally take days to do. The problem is because regadas has already played the stage, therefore the tables DYN_classification_stage_cym5 and DYN_classification_race_cym5 have been affected and to sort out all them results so they are correct after putting a rider back in, would definately take days.
So unfortunately I doubt this savegame will get fixed
Atl least we now know that if you're in an important race, either play the stages or make a backup before simulating