Packaging for several ubuntu version

[Andoni Morales Alastruey]

Hi,
I want to know wich is the default behaviour to package an app for
several Ubuntu versions.
Im trying to package my app both for Hardy and Intrepid. I first
"dbuild" my app for hardy using "longomatch (0.8.0) hardy; urgency=low"
in the the debian/Changelog and i send it using dput to my ppa.
Then I "debuild" for intrepid setting "longomatch (0.8.0) intrepid;
urgency=low" in the the debian/Changelog and I try to send it to my ppa
but, of course, i get an error telling that I already sent it:
Already uploaded to ppa.launchpad.net

Thanks, 
-- 
Andoni Morales Alastruey <ylatuya at gmail.com>
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