Fatal error at beginning of edgy cdrom upgrade

It said to upload this:

Traceback (most recent call last):

  File "/tmp/tmp.v1O1Yi/edgy", line 40, in ?
    app.run()

  File "/tmp/tmp.v1O1Yi/DistUpgradeControler.py", line 765, in run
    self.edgyUpgrade()

  File "/tmp/tmp.v1O1Yi/DistUpgradeControler.py", line 744, in edgyUpgrade
    if not self.askDistUpgrade():

  File "/tmp/tmp.v1O1Yi/DistUpgradeControler.py", line 438, in askDistUpgrade
    if not self.cache.distUpgrade(self._view):

  File "/tmp/tmp.v1O1Yi/DistUpgradeCache.py", line 237, in distUpgrade
    if not self._installMetaPkgs(view):

  File "/tmp/tmp.v1O1Yi/DistUpgradeCache.py", line 343, in _installMetaPkgs
    self[key].markInstall()

  File "/usr/lib/python2.4/site-packages/apt/cache.py", line 78, in __getitem__
    return self._dict[key]

KeyError: 'ubuntu-desktop'