The child was adjudicated delinquent for conduct that would have constituted terroristic threats and drug offenses if committed by an adult, and was placed on probation. After finding a probation violation, the juvenile court committed the child to the custody of the Department of Juvenile Justice. The Court of Appeals of Georgia held that the juvenile court lacked authority to impose that disposition for the probation violation as charged. Although a juvenile court may in some circumstances modify an earlier order because changed circumstances affect the child’s best interests, the order here treated the probation violation itself as the delinquent act supporting commitment. Because the resulting disposition exceeded the court’s legal authority, it was void. The appellate court vacated the dispositional order and remanded for entry of a new order consistent with the governing juvenile statutes.