[24-Aug-2018 23:21:40 UTC] WordPress database error Duplicate column name 'scheme' for query ALTER TABLE `mvmg_domain_mapping` ADD COLUMN `scheme` TINYINT UNSIGNED NOT NULL DEFAULT 2 AFTER `active` made by require('wp-blog-header.php'), require_once('wp-load.php'), require_once('wp-config.php'), require_once('wp-settings.php'), include_once('/plugins/domain-mapping/domain-mapping.php'), domainmap_launch, Domainmap_Plugin->set_module, Domainmap_Module_System->__construct, Domainmap_Module_System->_upgrade, apply_filters('domainmaping_database_upgrade'), WP_Hook->apply_filters, Domainmap_Module_System->upgrade_to_4_2, Domainmap_Module_System->_exec_queries