text: ALTER TABLE `lh_abstract_proactive_chat_campaign_conv` ADD INDEX `ctime` (`ctime`);
  INSERT INTO `lh_chat_config` (`identifier`,`value`,`type`,`explain`,`hidden`) VALUES ('departament_availability','364','0','How long department availability statistic should be kept? (days)','0');
  INSERT INTO `lh_chat_config` (`identifier`,`value`,`type`,`explain`,`hidden`) VALUES ('uonline_sessions','364','0','How long keep operators online sessions data? (days)','0')