error: fakeroot: missing required signature

[serons]

I'm new to Arch and have installed it on Raspberry Pi. I get the following error:
$this->bbcode_second_pass_code('', '# pacman -S fakeroot
...
error: fakeroot: missing required signature
...
')
Recently I changed some settings for signature verification and suspect that the error lies there, but don't understand what's wrong.

I used pacman-key to initialize and populate as described on the pacman-key Wiki page.

What could be causing the error?

My options settings in /etc/pacman.conf are:
$this->bbcode_second_pass_code('', '[options]
HoldPkg = pacman glibc
XferCommand = /usr/bin/wget --passive-ftp -c -O %o %u
Architecture = armv6h

Color
CheckSpace

SigLevel = Required DatabaseOptional
LocalFileSigLevel = Optional

[core]
Include = /etc/pacman.d/mirrorlist

[extra]
Include = /etc/pacman.d/mirrorlist

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

[alarm]
Include = /etc/pacman.d/mirrorlist

[aur]
Include = /etc/pacman.d/mirrorlist')

[WarheadsSE]

We don't sign at the moment

[serons]

I see. Thank you.