Due to the Arch activities for KDE described in this announcement, some AUR package maintainers haven’t adjusted their packages yet accordingly:
The best thing would be to temporarily remove those AUR packages and update (and if a comment has not been left yet to the mainteiner in the AUR, leave a comment there possibly).
You can uninstall samba-mounter-git, libkipi, kipi-plugins.
I see also a comment about it here, for example: https://aur.archlinux.org/packages/libkipi#comment-939450