Starte wieder deine Konsole / Terminal und werde dort Root.
Root werden mit "su -" (ohne Anführungsstriche) - dann ENTER und blind dein Root-Passwort eingeben
Danach folgende Repos löschen mit:
zypper rr "https://download.opensuse.org/repositories/LibreOffice:/7.3/openSUSE_Leap_15.4/"
zypper rr "https://download.opensuse.org/repositories/SUSE:/SLE-15-SP2:/Update/pool-leap-15.4/"
zypper rr "https://download.opensuse.org/repositories/SUSE:/SLE-15-SP3:/GA/pool/"
zypper rr "https://download.opensuse.org/repositories/SUSE:/SLE-15-SP1:/GA/pool/"
zypper rr "https://download.opensuse.org/repositories/SUSE:/SLE-15-SP1:/Update/pool-leap-15.4/"
zypper rr "https://download.opensuse.org/repositories/SUSE:/SLE-15:/Update/pool-leap-15.4/"
zypper rr "https://download.opensuse.org/repositories/SUSE:/SLE-15-SP4:/GA/pool/"
zypper rr "https://download.opensuse.org/repositories/SUSE:/SLE-15-SP3:/Update/pool-leap-15.4/"
zypper rr "https://download.opensuse.org/repositories/home:/plasmaregataos/15.4/"
zypper rr "https://download.opensuse.org/repositories/SUSE:/SLE-15-SP2:/GA/pool/"
zypper rr "https://download.opensuse.org/update/leap/15.4/backports_debug/"
zypper rr "https://download.opensuse.org/debug/update/leap/15.4/oss/"
zypper rr "https://download.opensuse.org/source/distribution/leap/15.4/repo/oss/"
Bevor wir dann weiter machen, zeigst du uns noch mal: