diff --git a/db/update21.7.6.sql b/db/update21.7.6.sql
new file mode 100644
index 0000000000..d4fdb1b5f5
--- /dev/null
+++ b/db/update21.7.6.sql
@@ -0,0 +1 @@
+ALTER TABLE `zt_demand` CHANGE `version` `version` smallint NOT NULL DEFAULT '1';
\ No newline at end of file
diff --git a/db/zentao.sql b/db/zentao.sql
index 6caaad1dbd..625bc71707 100755
--- a/db/zentao.sql
+++ b/db/zentao.sql
@@ -15841,7 +15841,7 @@ CREATE TABLE IF NOT EXISTS `zt_demand` (
   `mailto` text NULL,
   `duplicateDemand` mediumint(8) NULL,
   `childDemands` varchar(255) NOT NULL DEFAULT '',
-  `version` varchar(255) NOT NULL DEFAULT '',
+  `version` smallint NOT NULL DEFAULT '1',
   `parentVersion` smallint NOT NULL DEFAULT 0,
   `vision` varchar(255) NOT NULL DEFAULT 'or',
   `color` varchar(255) NOT NULL DEFAULT '',