I haven't figured out exactly where the problem is, but a symptom of the problem is this:
Upgrade package lxd 2.0.5-0ubuntu1~ubuntu16.04.1 to 2.8-0ubuntu1~ubuntu16.04.1
(from https://landscape.is.canonical.com/account/standalone/activity/2208329, computer 12351)
2.8 is from xenial-backports, and Landscape shouldn't try to upgrade to it.
I haven't figured out exactly where the problem is, but a symptom of the problem is this:
Upgrade package lxd 2.0.5-0ubuntu1~ ubuntu16. 04.1 to 2.8-0ubuntu1~ ubuntu16. 04.1
(from https:/ /landscape. is.canonical. com/account/ standalone/ activity/ 2208329, computer 12351)
2.8 is from xenial-backports, and Landscape shouldn't try to upgrade to it.