Remove the science-repo and game-repo to fix the issue with fail output. Close session and restart termux after update
(Pkg or apt) remove science-repo && (pkg or apt) remove game-repo && (pkg or apt) update && reboot
$apt-get update --allow-releaseinfo-change --allow-downgrades $pkg update --allow-releaseinfo-change --fix-missing Than install the root-repo and install tsu if your device is rooted to install the sudo command