Comment 21 for bug 1015567

On 26 September 2012 17:52, Tom K. C. Chiu <email address hidden> wrote:
> To add more details to such problem, I tried to revert the source as:
>
> sudo sed -i.dist 's,quantal,precise,' /etc/apt/sources.list
>
> and then did the update and dist-upgrade. The same error persist:
>
> dpkg: error: parsing file '/var/lib/dpkg/status' near line 75249 package 'libstdc++5:i386':
> mixed non-coinstallable and coinstallable package instances present
> E: Sub-process /usr/bin/dpkg returned an error code (2)
> root@bkgovsrv1:~#
>

Changing source lines, does not downgrade packages. You are still
running dpkg from quantal.