Daytona 116500 suddenly super fast

[natdad]

My Daytona had been keeping time perfectly (4 years old). Has been serviced once for stopping suddenly but fixed under warranty less than 2 years ago. Now all of a sudden it is super fast. Like 1-2 hours a day fast. I don’t think it has been magnetized but can you think of what the problem might be? I imagine it will have to be sent in again, but that seems like a lot of service needed for a relatively new watch. My gmt has almost never needed service and it’s 15 years old.