ALTER engine=Columnstore of a Columnstore table fails

ALTER engine=Columnstore of a Columnstore table fails. It should be allowed as in Innodb.

MariaDB [test]> CREATE TABLE t_mcs1 (id INT) ENGINE=Columnstore;
Query OK, 0 rows affected (0.226 sec)

MariaDB [test]> ALTER TABLE mcs1 ENGINE=Columnstore;
ERROR 1815 (HY000): Internal error: CAL0009: Internal create table error for test.mcs1 : table already exists (your schema is probably out-of-sync)