I have already surfaced the case in 1.20.0 release: https://lists.apache.org/thread.html/33694a2e754ff63e49e5fd05d52be1f72773c15f4a66adf766223b86%40%3Cdev.calcite.apache.org%3E
Technically speaking, Calcite release artifacts violate ASF licensing policy. Then it is up to the release manager to decide if the release is valid or not. Vladimir
