/usr/lib/bacula/libbaccats-5.2.6.so is in bacula-common-pgsql 5.2.6+dfsg-9.1ubuntu3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/bacula/libbaccats-postgresql.so
/usr/lib/bacula/libbaccats-postgresql.so