This started happening between 2020-03-19 01:47:00 and 2020-03-21 00:14:31. In the last working YaST call, you installed packages. At that time, you had those repositories active: iso:/?iso=openSUSE.iso&url=hd:/?device=/dev/sda2 http://download.opensuse.org/update/leap/15.0/oss/ http://download.opensuse.org/update/leap/15.0/non-oss/ http://download.opensuse.org/distribution/leap/15.0/repo/oss/ http://download.opensuse.org/distribution/leap/15.0/repo/non-oss/ http://download.opensuse.org/debug/distribution/leap/15.0/repo/oss/ http://download.opensuse.org/debug/distribution/leap/15.0/repo/non-oss/ http://download.opensuse.org/debug/update/leap/15.0/oss/ http://download.opensuse.org/debug/update/leap/15.0/non-oss/ http://download.opensuse.org/source/distribution/leap/15.0/repo/oss/ http://download.opensuse.org/source/distribution/leap/15.0/repo/non-oss/ http://dl.google.com/linux/chrome/rpm/stable/x86_64 https://mirrors.aliyun.com/opensuse/distribution/leap/15.0/repo/oss https://mirrors.aliyun.com/opensuse/distribution/leap/15.0/repo/non-oss https://mirrors.aliyun.com/opensuse/update/leap/15.0/oss https://mirrors.aliyun.com/opensuse/update/leap/15.0/non-oss http://packman.inode.at/suse/openSUSE_Leap_15.0/ http://download.opensuse.org/repositories/M17N/openSUSE_Leap_15.1/ Notice the last one which was for Leap 15.1, not your Leap 15.0.