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: mono (Ubuntu)
Status: New => Invalid
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Bugs, which is
** Tags removed: need-duplicate-check
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https://bugs.launchpad.net/bugs/1721612
Title:
package libmono-system-drawing4.0-cil 4.6.2.7+dfsg-1ubuntu1 failed to
install/upgrade: package
