It still present in Kubuntu 21.04/KDE 5.21.4. According to this bug [ https://bugs.kde.org/show_bug.cgi?id=436250 ] it's a Kubuntu packaging issue.
** Bug watch added: KDE Bug Tracking System #436250 https://bugs.kde.org/show_bug.cgi?id=436250 ** Attachment added: "Screenshot_20210428_025550.png" https://bugs.launchpad.net/ubuntu/+source/plasma-workspace/+bug/1872833/+attachment/5492965/+files/Screenshot_20210428_025550.png ** Changed in: plasma-workspace (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1872833 Title: Duplicate Breeze themes in SDDM configuration To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/plasma-workspace/+bug/1872833/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs