$ sudo do-release-upgrade
Checking for a new Ubuntu release
Traceback (most recent call last):
  File "/usr/bin/do-release-upgrade", line 125, in <module>
    useProposed=options.proposed_release)
  File "/usr/lib/python3/dist-packages/UpdateManager/Core/MetaRelease.py", line 99, in __init__
    cache = apt.Cache()
  File "/usr/lib/python3/dist-packages/apt/cache.py", line 113, in __init__
    self.open(progress)
  File "/usr/lib/python3/dist-packages/apt/cache.py", line 165, in open
    self._depcache = apt_pkg.DepCache(self._cache)
apt_pkg.Error: E:The package linux-headers-4.8.0-51-generic needs to be reinstalled, but I can't find an archive for it.
$