- Add a repo with gpg key.
- Change the gpg key on repo server machine(update the repomd.xml.key and repomd.xml.asc files in repodata with new gpg key.See https://twiki.innerweb.novell.com/bin/view/Main/HowToCreateRepoSignatures)
- Update from the repo using Package kit.
vp.3. It could update successfully without any error message.