That version is now dead
http://news.softpedia.com/news/ubuntu-17-04-zesty-zapus-has-reached-end-of-life-upgrade-to-ubuntu-17-10-now-519360.shtml
** Changed in: gnome-icon-theme (Ubuntu)
Status: New => Invalid
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Deskto
** Tags removed: need-duplicate-check
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Desktop Bugs, which is subscribed to gnome-icon-theme in Ubuntu.
https://bugs.launchpad.net/bugs/1715716
Title:
package gnome-icon-theme (not installed) failed to install/upgrade:
u