/usr/lib/x86_64-linux-gnu/libguichan_allegro-0.8.1.so.1 is in libguichan-allegro-0.8.1-1v5 0.8.2-15.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libguichan_allegro-0.8.1.so.1.1.0