[ceph-users] can't remove osd service by "ceph orch rm <service name>"

Hi, This is with v15.2 and v15.2.8. Once an OSD service is applied, it can't be removed. It always shows up from "ceph orch ls". "ceph orch rm <osd service name>" only marks it "unmanaged", but not actually removes it. Is this the expected? Thanks! Tony