/usr/lib/x86_64-linux-gnu/libignition-common1.so is in libignition-common-dev 1.0.1-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libignition-common1.so.1
/usr/lib/x86_64-linux-gnu/libignition-common1.so.1