executing this command:
sudo dnf distro-sync --refresh --allowerasing --releasever=43
I got this error:
Transaction failed: Signature verification failed.
OpenPGP check for package “utf8proc-2.11.3+git.0.e5e7992-1.fc43.x86_64” (/var/cache/libdnf5/copr:copr.fedorainfracloud.org:agriffis:neovim-nightly-f7da4f68050b38bf/packages/utf8proc-2.11.3+git.0.e5e7992-1.fc43.x86_64.rpm) from repo “copr:copr.fedorainfracloud.org:agriffis:neovim-nightly” has failed: Problem occurred when opening the package.