database error Unknown column

Events Manager 6.4.4

Report – Events Manager 6.4.4 – PluginTests.com

WordPress database error Unknown column 'booking_meta_migrated' in 'where clause' for query SELECT booking_id, booking_meta FROM wp_em_bookings WHERE booking_meta_migrated IS NULL LIMIT 500 made by require_once('wp-admin/admin.php'), require_once('wp-load.php'), require_once('wp-config.php'), require_once('wp-settings.php'), do_action('init'), WP_Hook->do_action, WP_Hook->apply_filters, em_init, em_install, em_upgrade_current_installation

WordPress database error Can't DROP COLUMN booking_meta_migrated; check that it exists for query ALTER TABLE wp_em_bookings DROP booking_meta_migrated made by require_once('wp-admin/admin.php'), require_once('wp-load.php'), require_once('wp-config.php'), require_once('wp-settings.php'), do_action('init'), WP_Hook->do_action, WP_Hook->apply_filters, em_init, em_install, em_upgrade_current_installation

Please also fix the PHP warnings, Thanks!