Bug#1089177: mpich: upload to unstable re-used version from experimental

[Graham Inggs]

Source: mpich
Version: 4.2.1-2
Severity: important

Hi Maintainer

The recent upload to unstable re-used a version number that was
previously used in experimental.

I'm surprised dak allowed this, and I'm not sure what problems it
might cause in Debian, but it did cause the wrong version to be sync'd
downstream into Ubuntu.

Please use 4.2.1-4 for the next upload, as 4.2.1-3 was also previously
used in experimental.

Regards
Graham