I have just tried to do a system upgrade and the following message appeared.
pacman -Syu
:: Synchronising package databases...
system 261.4 KiB 373 KiB/s 00:01 [##########] 100%
world 1882.8 KiB 2.35 MiB/s 00:01 [##########] 100%
galaxy 1840.1 KiB 2.26 MiB/s 00:01 [##########] 100%
:: Starting full system upgrade...
resolving dependencies...
looking for conflicting packages...
error: failed to prepare transaction (could not satisfy dependencies)
:: installing protobuf (3.17.3-1) breaks dependency 'libprotobuf.so=27-64' required by libphonenumber
I have discovered that libphonenumber is installed but I didn't install it and I cannot see any reason why this package should be installed on a laptop?
https://wiki.archlinux.org/title/Pacman#Installation_reason
https://wiki.archlinux.org/title/Pacman#Pactree
libphonenumber was updated a couple of hours ago to the latest protobuf version. Maybe your mirror just didn't catch up yet.
A few minutes after posting the message I tried again and the system updated.