To upgrade Zonemaster-Backend from versions 4.0.x to versions 5.0.x you have to upgrade the database.

FreeBSD

If the installation is on FreeBSD, then set the environment before running any of the commands below:

export ZONEMASTER_BACKEND_CONFIG_FILE="/usr/local/etc/zonemaster/backend_config.ini"

MySQL (or MariaDB)

Run

cd $(perl -MFile::ShareDir -le 'print File::ShareDir::dist_dir("Zonemaster-Backend")')
perl patch_db_mysql_for_backend_DB_version_lower_than_5.0.0.pl

PostgreSQL

Run

cd $(perl -MFile::ShareDir -le 'print File::ShareDir::dist_dir("Zonemaster-Backend")')
perl patch_db_postgresq_for_backend_DB_version_lower_than_5.0.0.pl