Error 404: Failed to prepare transaction

[Nachlese]

Tried to to update my system and I get this error

change this: to this: #[community] #SigLevel = PackageRequired #Include = /etc/pacman.d/mirrorlist or just delete those three lines then run: sudo pacman-mirrors -f to refresh the list of mirrors

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change this:

[community]
SigLevel = PackageRequired
Include = /etc/pacman.d/mirrorlist

to this:

#[community]
#SigLevel = PackageRequired
#Include = /etc/pacman.d/mirrorlist

or just delete those three lines

then run:
sudo pacman-mirrors -f
to refresh the list of mirrors