WordPress database error: [Duplicate column name 'hit_duration']
ALTER TABLE `ahc_hits` ADD `hit_duration` INT(11) UNSIGNED NULL DEFAULT NULL

WordPress database error: [Duplicate key name 'ahcfree_idx_site_ip_date']
ALTER TABLE `ahc_recent_visitors` ADD INDEX `ahcfree_idx_site_ip_date` (`site_id`, `vtr_ip_address`, `vtr_date`)