Comment 3 for bug 1628251

The problem is indicated in the ErrorMessage, the reporter is using a French version so that's what the logs are in:
ErrorMessage: le paquet libhcrypto4-heimdal:amd64 1.7~git20160703+dfsg-1 ne peut pas être configuré parce que la version de libhcrypto4-heimdal:i386 est différente (1.7~git20150920+dfsg-4ubuntu1)

Translation:
ErrorMessage: package libhcrypto4-heimdal:amd64 1.7~git20160703+dfsg-1 cannot be configured because libhcrypto4-heimdal:i386 is at a different verison (1.7~git20150920+dfsg-4ubuntu1)

The problem is the i386 packages for heimdal 1.7~git20160703+dfsg-1 in yakkety-proposed failed to build, which creates a version conflict if you have both the i386 and amd64 packages and try to upgrade to the version in yakkety-proposed.

A workaround is to uninstall the i386 packages, which should let the amd64 package upgrade to the version in proposed, but that won't help anyone who for whatever reason needs both the i386 and amd64 packages because of some other dependency. The version in proposed also failed to build for armh64 and powerpc, so the larger problem is that this version isn't available on users with i386, armh64 or powerpc distributions.