Manjaro lsb-release set to Arch (lsb-release: /etc/lsb-release exists in filesystem)

I tried upgrading my packages with pacman -Syu and got an error message.

error: failed to commit transaction (conflicting files)
lsb-release: /etc/lsb-release exists in filesystem (owned by manjaro-release)
Errors occurred, no packages were upgraded.

So I thought I could try backing up the /etc/lsb-release file (with another name) so maybe the conflict would be resolved after doing another upgrade.

Although running pacman -Syu again now succeeds without errors, the /etc/lsb-release file contains the following:

LSB_VERSION=1.4
DISTRIB_ID=Arch
DISTRIB_RELEASE=rolling
DISTRIB_DESCRIPTION="Arch Linux"

While it used to contain:

DISTRIB_ID=ManjaroLinux
DISTRIB_RELEASE=21.1.6
DISTRIB_CODENAME=Pahvo
DISTRIB_DESCRIPTION="Manjaro Linux"

So my system is now recognizing Arch as its distribution which is not right. Is it possible to reverse this action and what did I do wrong?