diff --git a/db/update21.7.7.sql b/db/update21.7.7.sql
index 6597a519ea..09df1c3d75 100644
--- a/db/update21.7.7.sql
+++ b/db/update21.7.7.sql
@@ -602,7 +602,6 @@ ALTER TABLE `zt_demand`
   MODIFY COLUMN `id` int unsigned NOT NULL AUTO_INCREMENT,
   MODIFY COLUMN `pool` int unsigned NOT NULL DEFAULT 0,
   MODIFY COLUMN `module` int unsigned NOT NULL DEFAULT 0,
-  MODIFY COLUMN `parent` int unsigned NOT NULL DEFAULT 0,
   MODIFY COLUMN `pri` tinyint unsigned NOT NULL DEFAULT 3,
   MODIFY COLUMN `category` varchar(30) NOT NULL DEFAULT '',
   MODIFY COLUMN `source` varchar(30) NOT NULL DEFAULT '',
diff --git a/db/zentao.sql b/db/zentao.sql
index 579f6cf2fb..291ca7fc39 100755
--- a/db/zentao.sql
+++ b/db/zentao.sql
@@ -15823,7 +15823,7 @@ CREATE TABLE IF NOT EXISTS `zt_demand` (
   `pool` int unsigned NOT NULL DEFAULT 0,
   `module` int unsigned NOT NULL DEFAULT 0,
   `product` varchar(255) NOT NULL DEFAULT '',
-  `parent` int unsigned NOT NULL DEFAULT 0,
+  `parent` int NOT NULL DEFAULT 0,
   `pri` tinyint unsigned NOT NULL DEFAULT 3,
   `category` varchar(30) NOT NULL DEFAULT '',
   `source` varchar(30) NOT NULL DEFAULT '',