Comment 7 for bug 1862700

It looks to me like all box versions are redirected to current. For ubuntu/bionic this is why selecting an older box version doesn't work around ubuntu/bionic v20200210 being corrupt.

For ubuntu/trusty64 it means even if you ask for an old box you get the current box. I've filed bug 1862978. https://bugs.launchpad.net/cloud-images/+bug/1862978