Note that the full hands-on may also require that the old local InRelease file for the distribution is removed manually, so the sequence of command would thus be (eg for chimaera):

• # rm /var/lib/apt/lists/deb.devuan.org_merged_dists_chimaera_InRelease

• # apt-get update --allow-unauthenticated --allow-insecure-repositories

• # apt-get install devuan-keyring --allow-unauthenticated

Alternatively: Anyone uncomfortable with those command line options should rather download the new keyring directly, eg

• # wget http://deb.devuan.org/devuan/pool/main/ … 04_all.deb

• # sha256sum devuan-keyring_2022.09.04_all.deb 96c4a206e8dfdc21138ec619687ef9acf36e1524dd39190c040164f37cc3468d

• # dpkg -i devuan-keyring_2022.09.04_all.deb

Alternatively: if you have your own method that works, then that is fine too.