Composite partition key in starrocks 3.3 does not seem to work

Working with Data
1

using the example from documentation, I get an error No viable statement for input ‘PARTITION BY tenant_id,’. :

CREATE TABLE activity (
  tenant_id INT,
  dt DATETIME,
  id BIGINT
)
DUPLICATE KEY(dt, id)
PARTITION BY tenant_id, date_trunc('MONTH', dt)
DISTRIBUTED BY HASH(id);

example taken from Partitioning | StarRocks