This bug was fixed in the package ubuntu-release-upgrader - 1:17.04.8
--------------- ubuntu-release-upgrader (1:17.04.8) zesty; urgency=medium
* Create demoted.cfg.xenial and DistUpgrade.cfg.xenial so that upgrades from Ubuntu 16.04 to Ubuntu 17.04 are supported. (LP: #1692092)
-- Brian Murray <email address hidden> Fri, 19 May 2017 10:31:43 -0700
This bug was fixed in the package ubuntu- release- upgrader - 1:17.04.8
--------------- release- upgrader (1:17.04.8) zesty; urgency=medium
ubuntu-
* Create demoted.cfg.xenial and DistUpgrade. cfg.xenial so that upgrades from
Ubuntu 16.04 to Ubuntu 17.04 are supported. (LP: #1692092)
-- Brian Murray <email address hidden> Fri, 19 May 2017 10:31:43 -0700