Here is what I did to recreate the issue. We can rebase the current proposal on top of https://review.openstack.org/#/c/522356/ and it should be pretty easy to see that it fails with a 400 Bad Request instead of a 500 Internal Server Error.
Here is what I did to recreate the issue. We can rebase the current proposal on top of https:/ /review. openstack. org/#/c/ 522356/ and it should be pretty easy to see that it fails with a 400 Bad Request instead of a 500 Internal Server Error.