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:001
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# - At update - #
# - Documentation - #
https://wiki.archlinux.org/title/Pacman/Package_signing#Upgrade_system_regularly

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# - Error - #
error: PackageName: signature from "User <email@archlinux.org>" is invalid
error: failed to commit transaction (invalid or corrupted package (PGP signature))
Errors occurred, no packages were upgraded.

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# - Solution 1 - #
sudo pacman -Sy archlinux-keyring && sudo pacman -Su


# -  - #
# - Solution 2 - #
# - If prior solution doesn't work use this - #
sudo killall gpg-agent;
sudo rm -rf /etc/pacman.d/gnupg;
sudo pacman-key --init;
sudo pacman-key --populate archlinux;



:101
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# - At update - #
## installing pacman (6.0.0-2) breaks dependency 'pacman<5.3' required by kalu-kde
sudo pacman -Rs kalu-kde;
update



:102
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conflicting dependencies: 
- betterlockscreen-git and betterlockscreen are in conflict

sudo pacman -Su --ignore betterlockscreen



:103
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# - At update - #
sudo pacman -Syy archlinux-keyring;



:104
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# - At update - #
https://forum.manjaro.org/t/error-failed-to-synchronize-all-databases-invalid-or-corrupted-database-pgp-signature/76320

error: failed to synchronize all databases (invalid or corrupted database (PGP signature))

OK the *sig files in /var/lib/pacman/sync/ were damaged by my stupid Netgear WIFI extender! 
I could see the Netgear “mywifiext” URL in there. 
I just deleted *sig and now Pacman works fine. Seems to be SOLVED. Thanks. 

sudo rm -r /var/lib/pacman/sync/*.sig;
update




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