I just switched from stable to testing from stable and got this warning:
sudo pacman -Syyu
[sudo] password for ben:
:: Synchronizing package databases...
core 171.8 KiB 80.5 KiB/s 00:02 [#####################################] 100%
extra 1901.9 KiB 808 KiB/s 00:02 [#####################################] 100%
community 6.7 MiB 2.62 MiB/s 00:03 [#####################################] 100%
multilib 177.2 KiB 87.0 KiB/s 00:02 [#####################################] 100%
:: Starting full system upgrade...
warning: alsa-card-profiles: local (1:0.3.37-1) is newer than extra (1:0.3.36-1)
warning: btrfs-progs: local (5.14.1-1) is newer than core (5.14-1)
warning: haveged: local (1.9.14-2) is newer than extra (1.9.14-1)
warning: pipewire: local (1:0.3.37-1) is newer than extra (1:0.3.36-1)
warning: pipewire-media-session: local (1:0.3.37-1) is newer than extra (1:0.3.36-1)
resolving dependencies...
looking for conflicting packages...
Packages (2) manjaro-release-21.1.5-1 mhwd-nvidia-470.74-1
Looking at the branch-compare, it appears stable-staging is far more updated than testing. Did you forget to snap some of the updates to testing before stable-staging and stable?