MarsSeed [1] filed a deletion request for cura-51-beta [2]: Unneeded old fixed version beta package with wrong name (not for v51 but v5.1 beta).
Current stable is v5.4.0. [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/cura-51-beta/
