Title: database error Unknown column
Last modified: July 27, 2023

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# database error Unknown column

 *  Resolved [Jarko Piironen](https://wordpress.org/support/users/ipajen/)
 * (@ipajen)
 * [2 years, 10 months ago](https://wordpress.org/support/topic/database-error-unknown-column-4/)
 * Events Manager 6.4.4
 * [Report – Events Manager 6.4.4 – PluginTests.com](https://plugintests.com/plugins/wporg/events-manager/latest)
 *     ```wp-block-code
       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!

The topic ‘database error Unknown column’ is closed to new replies.

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## Tags

 * [php](https://wordpress.org/support/topic-tag/php/)

 * 0 replies
 * 1 participant
 * Last reply from: [Jarko Piironen](https://wordpress.org/support/users/ipajen/)
 * Last activity: [2 years, 10 months ago](https://wordpress.org/support/topic/database-error-unknown-column-4/)
 * Status: resolved