Solved

Pilot too old !

My pilot was 23 years old.
Why the day after become 25 years old ????

https://igpmanager.com/app/d=driver&id=3721255

Did you remember your other driver by any chance ?
According to your driver experience (25 year old) his age is normal if started 18 should be 24 if started 17.

Drivers get
+1 experience every 10 races
+1 year of Age every 20 races

Ah ok ! A pilot could be more old by the races and by the experience ?
Good to know.....thanks.