Comment 2 for bug 1311151

rc images were never intended to be removed. nor will 'release' versions in the future.
cloud-images has 'release', 'rc', 'beta' images all available.

the general plan for cloud images has always been to keep *anything* called 'release' indefinitely. We can change that policy for maas images to be "only keep the latest N" or something, but 'N' will most certainly be greater than 1 which will expose the bug.

maas *should* only import the latest 'N' versions. I was told that 'N' was set to '1' for maas. If its not doing that then you need to fix it.