diff --git a/db/update18.3.sql b/db/update18.3.sql
index c51ca3a762..69418260c0 100644
--- a/db/update18.3.sql
+++ b/db/update18.3.sql
@@ -819,7 +819,10 @@ CHANGE `duplicateStory` `duplicateStory` mediumint unsigned NOT NULL DEFAULT '0'
 CHANGE `notifyEmail` `notifyEmail` varchar(100) NOT NULL DEFAULT '';
 
 ALTER TABLE `zt_storyreview`
+CHANGE `result` `result` varchar(30) NOT NULL DEFAULT '',
 CHANGE `reviewDate` `reviewDate` datetime NULL;
+ALTER TABLE `zt_storyspec`
+CHANGE `files` `files` text NULL;
 
 ALTER TABLE `zt_task`
 CHANGE `designVersion` `designVersion` smallint unsigned NOT NULL DEFAULT '1',
diff --git a/db/zentao.sql b/db/zentao.sql
index ab4e967fa5..58044708eb 100755
--- a/db/zentao.sql
+++ b/db/zentao.sql
@@ -1620,7 +1620,7 @@ CREATE TABLE IF NOT EXISTS `zt_storyreview` (
   `story` mediumint(9) NOT NULL,
   `version` smallint(6) NOT NULL,
   `reviewer` varchar(30) NOT NULL,
-  `result` varchar(30) NOT NULL,
+  `result` varchar(30) NOT NULL DEFAULT '',
   `reviewDate` datetime NULL
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
 CREATE UNIQUE INDEX `story` ON `zt_storyreview`(`story`,`version`,`reviewer`);
@@ -1641,7 +1641,7 @@ CREATE TABLE IF NOT EXISTS `zt_storyspec` (
   `title` varchar(255) NOT NULL,
   `spec` mediumtext NOT NULL,
   `verify` mediumtext NOT NULL,
-  `files` text NOT NULL
+  `files` text NULL
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
 CREATE UNIQUE INDEX `story` ON `zt_storyspec`(`story`,`version`);
 -- DROP TABLE IF EXISTS `zt_storystage`;
diff --git a/module/story/model.php b/module/story/model.php
index 414d0a087d..c2648ea8fa 100644
--- a/module/story/model.php
+++ b/module/story/model.php
@@ -582,7 +582,7 @@ class storyModel extends model
             $story->source     = $stories->source[$i];
             $story->category   = $stories->category[$i];
             $story->pri        = $stories->pri[$i];
-            $story->estimate   = $stories->estimate[$i];
+            $story->estimate   = $stories->estimate[$i] ? $stories->estimate[$i] : 0;
             $story->spec       = $stories->spec[$i];
             $story->verify     = $stories->verify[$i];
             $story->status     = $saveDraft ? 'draft' : ((empty($stories->reviewer[$i]) and !$forceReview) ? 'active' : 'reviewing');