Comment 1 for bug 252689

The problem in doing that for packages that were already published is that client of your PPA will be confused. Also there is a high possibility that the new source will result in binaries that cannot be published because of copies of the old version may still published in the archive.

Try to imagine a archive as a VCS, you won't ask to replace a revision, would you ?

What's the real problem in increasing the package version ?