Comment 1 for bug 1462327

If you look at libcgmanager0, it is clearly not an issue of dropping the lesser digits. Its likely that there was an issue with the ddebs server and for example 204-5ubuntu20.12 wasn't available at the time of retracing. Looking at it now we can see 20.19 is available.

http://ddebs.ubuntu.com/pool/main/s/systemd/