Best is to learn/read.
Use
╭─sgs@i3 in ~
╰─λ alias | grep pacdif
alias pacdif 'sudo -H DIFFPROG=meld pacdiff'
=
sudo -H DIFFPROG=meld pacdiff
in terminal.
You got this to check
Search in forum or ask if you are not sure what to merge. Don’t hope to get a copy and paste answer.
Never use automatic. Please.
https://wiki.archlinux.org/title/Pacman/Pacnew_and_Pacsave
Or use
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