:: Status
BRANCH REPO ARCH JOB
unstable core x86_64 finished package commit
:: Process session successfully finished.
:: Pulling changes...
obtaining remote repository packages...
remove core/x86_64/pacman-mirrors-4.7.4-2-any.pkg.tar.xz.sig
replace core/x86_64/pacman-mirrors-4.7.4-2-any.pkg.tar.xz
:: Branch is up-to-date now.
The error occurs when the mirror pool is out of uptodate mirrors.
Reset the mirror pool with
sudo pacman-mirrors -c all