In the criminal justice system, a person is often placed on probation for a crime, for example, that carries a jail sentence of up to one year.
If the person commits a new crime, that's a probation violation that authorizes a judge to impose a jail sentence of up to one year for the first crime in addition to the punishment for the second crime.
If the second crime occurred after the first crime, but before the person was formally placed on probation for the first crime, that's not a probation violation (nevertheless it's part of the person's criminal history that may enhance the punishment for the second crime).
MLB may have a parallel system ... or not.