I realized just last Friday that we had a problem with the YaST:Devel repo on Leap 15.6: There was no repo based on the openSUSE_Leap_15.6_Update OBS project, just one based on openSUSE_Leap_15.6. That used to work for a while - until there were a number of updates available which would now cause dependency problems: With a newer libzypp, you'd now have to either keep the outdated older libzypp version, or downgrade all YaST packages to the one from 15.6 GA. Now there is the correct YaST:Devel repo: https://download.opensuse.org/repositories/YaST:/Head/openSUSE_Leap_15.6_Upd... You can either remove and then re-add your existing YaST:Head repo, or simply edit the URL in the .repo file in /etc/zypp/repos.d : [repo-yast-head] name=YaST:Head enabled=1 autorefresh=1 baseurl=https://download.opensuse.org/repositories/YaST:/Head/openSUSE_Leap_${releasever}_Update/ path=/ type=rpm-md priority=50 keeppackages=0 I realized the problem first when I did a manual zypper migration of my old Leap 15.5 to 15.6 with the YaST:Head repo first disabled, then re-enabled: It complained that there was no https://download.opensuse.org/repositories/YaST:/Head/openSUSE_Leap_15.6_Upd... , so I removed the '_Update' part to make it work; which turned out to be a bad idea. If you did something similar, please use the new URL above. Kind regards -- Stefan Hundhammer <shundhammer@suse.de> YaST Developer SUSE Software Solutions Germany GmbH GF: Ivo Totev; HRB 36809, AG Nürnberg