/usr/share/lua/5.3/system/init.lua is in lua-system 0.2.1-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/lua/5.3/system/../../5.1/system/init.lua
/usr/share/lua/5.3/system/../../5.1/system/init.lua