Ubuntu – Failed to fetch PPA Error (Deluge)

Possible Duplicate:
How can I fix a 404 Error using a PPA?

How do I fix this error?

 W:Failed to fetch http://ppa.launchpad.net/deluge-team/ppa/ubuntu/dists/quantal/main/source/Sources  404  Not Found,
 W:Failed to fetch http://ppa.launchpad.net/deluge-team/ppa/ubuntu/dists/quantal/main/binary-amd64/Packages  404  Not Found,
 W:Failed to fetch http://ppa.launchpad.net/deluge-team/ppa/ubuntu/dists/quantal/main/binary-i386/Packages  404  Not Found,
 E:Some index files failed to download. They have been ignored, or old ones used instead.

Error even on Update Manager

The same error occur when I tried,

 sudo apt-get update && sudo apt-get upgrade

Best Answer

There is no Deluge packages on Quantal, as you can see on Launchpad's PPA page. To use Deluge, you need to edit the Deluge PPA entry to search packages for Precise in software-properties-gtk, changing the Distribution: field from quantal to precise:

Distribution Changing

After that, sudo apt-get update will show no errors about this repository.