Dear Paul, it would be very helpful if you - as the dbconfig-common maintainer - would be able to spare a few minutes to clear up the following issue, because the discussion is about dbconfig-common by now.
Klaus, the bug reporter, updated from bacula 7.0.5 to 7.4.0. This requires a database update. The automatic database update did not happen for him. My opinion is that the reason is his setting dbc_install='false' in /etc/dbconfig-common/bacula-director-sqlite3.conf. Klaus is of the opinion that setting it to 'true' will reinstall the database on updates, for that he quotes the question about reinstallation asked when doing "dpkg-reconfigure <packagename>". Thanks, Carsten Link to the bug: https://bugs.debian.org/825064
