He means that if you complete your probation and are discharged, you can't be subsequently violated. But that's not what you describe - you describe a deferment conditioned upon your successful completion of probation, and if normal procedures are followed they will check your traffic record and find the violation prior to your being discharged.
That would mean a conviction on (and points from) the ticket, and possibly additional fines, but it's unlikely that there would be further consequence for a civil infraction traffic ticket.

