Juvenile Justice Act Article 46

Where a person subject to protective measures is further subject to protective measures in another case and both the dispositions have been finalized, the juvenile court that imposed the latter disposition may determine the disposition to be executed by a ruling.Upon pronouncing the ruling for execution in accordance with the preceding paragraph, the other disposition shall be deemed revoked regardless whether they have been executed or not.
中文原文 少年事件處理法第46條
受保護處分之人,復受另件保護處分,分別確定者,後為處分之少年法院,得以裁定定其應執行之處分。
依前項裁定為執行之處分者,其他處分無論已否開始執行,視為撤銷。

English translation for reference only; the Chinese text prevails. Not legal advice.