/usr/share/doc/dpm-srm-server-mysql/changelog.Debian.gz is in dpm-srm-server-mysql 1.8.10-1build3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/dpm-srm-server-mysql/../liblcgdm1/changelog.Debian.gz