* Remove the unwanted xuan sql.

db/standard/zentao18.0.beta1.sql

@@ -1232,6 +1232,8 @@ CREATE TABLE `zt_im_chat` (
   `pinnedMessages` text NOT NULL,
   `mergedChats` text NOT NULL DEFAULT '',
   `adminInvite` enum('0','1') NOT NULL DEFAULT '0',
+  `avatar` text NOT NULL DEFAULT '',
+  `archiveDate` datetime NOT NULL DEFAULT '0000-00-00 00:00:00',
   PRIMARY KEY (`id`),
   KEY `gid` (`gid`),
   KEY `name` (`name`),

db/zentao.sql

@@ -6407,8 +6407,7 @@ CREATE TABLE IF NOT EXISTS `zt_im_message` (
   KEY `mgid` (`gid`),
   KEY `mcgid` (`cgid`),
   KEY `muser` (`user`),
-  KEY `mtype` (`type`),
-  UNIQUE `unique_msg`(`index`, `cgid`)
+  KEY `mtype` (`type`)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
 
 -- DROP TABLE IF EXISTS `zt_im_message_backup`;