Yep, that fixed it. Thanks!
** Changed in: update-manager (Ubuntu)
Status: Incomplete => Fix Released
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https://bugs.launchpad.net/bugs/1131247
Title:
Can't update to new release
The logs indicate that you have ubuntu-x-swat/x-updates and xorg-
edgers/ppa installed in your system. Those PPAs doesn't support
upgrading from one release to another.
Please use ppa-purge to remove those PPAs and retry:
sudo ppa-purge ppa:xorg-edgers/ppa
sudo ppa-purge ppa:ubuntu-x-swat/x-update
