Description:

I obtain a "Failed to commit transaction (conflicting files)" error when I run a pacman.

I follow this guide: https://wiki.archlinux.org/index.php/pacman#.22Failed_to_commit_transaction_.28conflicting_files.29.22_error

pacman -Qo /etc/fonts/conf.d
/etc/fonts/conf.d/ is owned by cantarell-fonts 1:0.0.25-2
/etc/fonts/conf.d/ is owned by cups-filters 1.11.4-1
/etc/fonts/conf.d/ is owned by fontconfig 2.12.1-3

The concerned files are fonts files only:
/etc/fonts/conf.d/57-dejavu-sans.conf/20-unhint-small-dejavu-sans.conf
/etc/fonts/conf.d/57-dejavu-sans.conf/20-unhint-small-dejavu-sans-mono.conf
/etc/fonts/conf.d/57-dejavu-sans.conf/20-unhint-small-dejavu-serif.conf
/etc/fonts/conf.d/57-dejavu-sans.conf/57-dejavu-sans.conf
/etc/fonts/conf.d/57-dejavu-sans.conf/57-dejavu-sans-mono.conf
/etc/fonts/conf.d/57-dejavu-sans.conf/57-dejavu-serif.conf

Additional info:
* package version(s)
cups-filters 1.11.5-1
* config and/or log files etc.à
as describe above

Steps to reproduce:

sudo pacman -Syu
:: Synchronizing package databases...
antergos is up to date 0.0 B 0.00B/s 00:00 [----------------------] 0%
core is up to date 0.0 B 0.00B/s 00:00 [----------------------] 0%
extra 1756.6 KiB 11.1M/s 00:00 [######################] 100%
community 3.7 MiB 11.2M/s 00:00 [######################] 100%
multilib is up to date 0.0 B 0.00B/s 00:00 [----------------------] 0%
:: Starting full system upgrade...
resolving dependencies...
looking for conflicting packages...

Packages (40) archlinux-keyring-20161101-1 bluez-libs-5.43-1
boost-libs-1.62.0-2 ceph-10.2.3-1 cups-filters-1.11.5-1
cython-0.25.1-1 dbus-glib-0.108-1 ffmpeg-1:3.2-2 git-2.10.2-1
lib32-llvm-libs-3.9.0-1 lib32-mesa-13.0.0rc2-1
lib32-mesa-libgl-13.0.0rc2-1 libcmis-0.5.1-4 libixion-0.11.1-3
liborcus-0.11.2-3 libproxy-0.4.13-1 libthai-0.1.25-1
libwps-0.4.4-1 libxi-1.7.8-1 libxml2-2.9.4+12+ge905f08-1
libxslt-1.1.29+23+geb1030d-1 linux-4.8.6-1 llvm-libs-3.9.0-1
mesa-13.0.0rc2-2 mesa-libgl-13.0.0rc2-2 mesa-vdpau-13.0.0rc2-2
mpg123-1.23.8-1 neon-0.30.2-1 nilfs-utils-2.2.6-1
pacman-mirrorlist-20161101-1 python-packaging-16.8-1
python-setuptools-1:28.7.1-1 python-simplejson-3.10.0-1
python-texttable-0.8.6-1 sdl2-2.0.5-2 shadow-4.4-2
ttf-dejavu-2.37-1 user-manager-5.8.3-1
xf86-video-intel-1:2.99.917+722+g714052f-1
xfce4-terminal-0.8.1-1

Total Download Size: 0.42 MiB
Total Installed Size: 568.43 MiB
Net Upgrade Size: 14.63 MiB

:: Proceed with installation? [Y/n] y
:: Retrieving packages...
user-manager-5.8.3-... 414.9 KiB 11.3M/s 00:00 [######################] 100%
python-texttable-0.... 12.7 KiB 4.14M/s 00:00 [######################] 100%
(40/40) checking keys in keyring [######################] 100%
(40/40) checking package integrity [######################] 100%
(40/40) loading package files [######################] 100%
(40/40) checking for file conflicts [######################] 100%
error: failed to commit transaction (conflicting files)
ttf-dejavu: /etc/fonts/conf.d/20-unhint-small-dejavu-sans-mono.conf exists in filesystem
ttf-dejavu: /etc/fonts/conf.d/20-unhint-small-dejavu-sans.conf exists in filesystem
ttf-dejavu: /etc/fonts/conf.d/20-unhint-small-dejavu-serif.conf exists in filesystem
ttf-dejavu: /etc/fonts/conf.d/57-dejavu-sans-mono.conf exists in filesystem
ttf-dejavu: /etc/fonts/conf.d/57-dejavu-sans.conf exists in filesystem
ttf-dejavu: /etc/fonts/conf.d/57-dejavu-serif.conf exists in filesystem
Errors occurred, no packages were upgraded.