anthraxx [1] filed a deletion request for irssi-otr4 [2]:

Superseded by upstream (and packaging standards) matching name irssi-otr [0]. I contacted the current maintainer (cbab) via mail and he agreed about this step.

[0] https://aur.archlinux.org/pkgbase/irssi-otr/

[1] https://aur.archlinux.org/account/anthraxx/ [2] https://aur.archlinux.org/pkgbase/irssi-otr4/