edgard [1] filed a request to merge papirus-icon-theme-kde [2] into papirus-icon-theme-git [3]:

package is deprecated an there is no "stable" version.

[1] https://aur.archlinux.org/account/edgard/ [2] https://aur.archlinux.org/pkgbase/papirus-icon-theme-kde/ [3] https://aur.archlinux.org/pkgbase/papirus-icon-theme-git/