You have to create a new database. Changing the existing database is not supported:
A container with provisioned throughput cannot be converted to shared database container. Conversely a shared database container cannot be converted to have a dedicated throughput.
Set throughput on a database and a container
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…