diff --git a/db/update18.3.sql b/db/update18.3.sql
index 1aaae55173..1b974ee0c7 100644
--- a/db/update18.3.sql
+++ b/db/update18.3.sql
@@ -770,6 +770,17 @@ CHANGE `assignedTo` `assignedTo` varchar(30) NOT NULL DEFAULT '',
 CHANGE `assignedDate` `assignedDate` datetime NULL;
 
 ALTER TABLE `zt_workflow`
+CHANGE `parent` `parent` varchar(30) NOT NULL DEFAULT '',
+CHANGE `child` `child` varchar(30) NOT NULL DEFAULT '',
+CHANGE `position` `position` varchar(30) NOT NULL DEFAULT '',
+CHANGE `titleField` `titleField` varchar(30) NOT NULL DEFAULT '',
+CHANGE `contentField` `contentField` text NULL,
+CHANGE `flowchart` `flowchart` text NULL,
+CHANGE `js` `js` text NULL,
+CHANGE `css` `css` text NULL,
+CHANGE `order` `order` smallint unsigned NOT NULL DEFAULT '0',
+CHANGE `administrator` `administrator` text NULL,
+CHANGE `desc` `desc` text NULL,
 CHANGE `editedBy` `editedBy` varchar(30) NOT NULL DEFAULT '',
 CHANGE `editedDate` `editedDate` datetime NULL;
 
diff --git a/db/zentao.sql b/db/zentao.sql
index 9241ccfa90..c15400026b 100755
--- a/db/zentao.sql
+++ b/db/zentao.sql
@@ -8875,24 +8875,24 @@ REPLACE INTO `zt_grouppriv` (`group`, `module`, `method`) VALUES
 -- DROP TABLE IF EXISTS `zt_workflow`;
 CREATE TABLE IF NOT EXISTS `zt_workflow` (
   `id` mediumint(8) unsigned NOT NULL AUTO_INCREMENT,
-  `parent` varchar(30) NOT NULL,
-  `child` varchar(30) NOT NULL,
+  `parent` varchar(30) NOT NULL DEFAULT '',
+  `child` varchar(30) NOT NULL DEFAULT '',
   `type` varchar(10) NOT NULL DEFAULT 'flow',
   `navigator` varchar(10) NOT NULL,
   `app` varchar(20) NOT NULL,
-  `position` varchar(30) NOT NULL,
+  `position` varchar(30) NOT NULL DEFAULT '',
   `module` varchar(30) NOT NULL,
   `table` varchar(50) NOT NULL,
   `name` varchar(30) NOT NULL,
-  `titleField` varchar(30) NOT NULL,
-  `contentField` text NOT NULL,
-  `flowchart` text NOT NULL,
-  `js` text NOT NULL,
-  `css` text NOT NULL,
-  `order` smallint(5) unsigned NOT NULL,
+  `titleField` varchar(30) NOT NULL DEFAULT '',
+  `contentField` text NULL,
+  `flowchart` text NULL,
+  `js` text NULL,
+  `css` text NULL,
+  `order` smallint(5) unsigned NOT NULL DEFAULT '0',
   `buildin` tinyint(1) unsigned NOT NULL,
-  `administrator` text NOT NULL,
-  `desc` text NOT NULL,
+  `administrator` text NULL,
+  `desc` text NULL,
   `version` varchar(10) NOT NULL DEFAULT '1.0',
   `status` varchar(10) NOT NULL DEFAULT 'wait',
   `vision` varchar(10) NOT NULL DEFAULT 'rnd',