pavbaranov [1] filed a deletion request for caledonia-bundle [2]:

It's very old customization package for KDE4 and it depends on caledonia-backgrounds that's no longer exists in our repos or even in AUR.

[1] https://aur.archlinux.org/account/pavbaranov/ [2] https://aur.archlinux.org/pkgbase/caledonia-bundle/