I copied my package from trusty's repository also to utopic's repository of my PPA without re-building the binaries by using Launchpad's copy packages feature. Now I noticed that the utopic package didn't work so I deleted it by using Launchpad's delete packages feature. Several hours later, my PPA now shows and publishes only for trusty so it seems to be ok. This time I copied the package using the re-build binaries option, but I get error "same version already has published binaries in the destination archive".
The question is: how can I REALLY REALLY REALLY delete the old packages from utopic's repository? I wouldn't like to release a new package version just because of this.