/usr/share/dbconfig-common/data/bareos-database-common/upgrade-dbadmin/pgsql/12 is in bareos-database-postgresql 14.2.1+20141017gitc6c5b56-3+deb8u3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/dbconfig-common/data/bareos-database-common/upgrade-dbadmin/pgsql/../../../../../../lib/bareos/scripts/ddl/updates/postgresql.11_12.sql