Journal contains these messages after installing new Fedora machine and CUPS. Solution: Add cups-ipptools as require of cups.
cups-2.2.8-6.fc29 has been submitted as an update to Fedora 29. https://bodhi.fedoraproject.org/updates/FEDORA-2018-e6d5142238
cups-2.2.8-6.fc29 has been pushed to the Fedora 29 testing repository. If problems still persist, please make note of it in this bug report. See https://fedoraproject.org/wiki/QA:Updates_Testing for instructions on how to install test updates. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2018-e6d5142238
cups-2.2.8-6.fc29 has been pushed to the Fedora 29 stable repository. If problems still persist, please make note of it in this bug report.