You can change the version number using this command at the top directory of project.
dch -v 0.0.3-xxx
Supposing an error comes out, use
Then, edit debian/chagelog compulsorily and eliminate the portion of 12.07-xxxx.
Your package version number on launchpad is higher than the new package number, so you have to use another package name, or use higher version number than present package, or delete present package.
How to delete present packages on PPA.
- open your PPA page.
- click "View package details" link that is right middle of site.
- click "Delete packages" link that is right top of site.
- select package.
- describe "Deletion comment" (Optional), if you want.
- click "Request Deletion" button.
Cautions: The easiest alternative to replace a broken source is always to upload a package with a higher version number and let the system automatically supersede and remove the older version. You should not rely on deletion requests to re-upload the same source version with different contents.
More information is there,
After deleting the old packages and 1 hour or more passes , try uploading new package.