I did email autobuild team regarding option to republish content of 15.3 GA from obs to ftp-stage. As the current ftp-stage content also contains QU2 content (isos+rpms). I'll keep the bug posted. In order to prevent this in the future we need to not republish the GA rpm-repos for 15.4. Also, removing the leap15.4_qu1 tag as this is 15.3 issue. We'll have to revisit: https://en.opensuse.org/openSUSE:LeapQuarterlyUpdates_howto