diff --git a/db/update21.7.3.sql b/db/update21.7.3.sql
index 84a8d4b92c..1538318d5c 100644
--- a/db/update21.7.3.sql
+++ b/db/update21.7.3.sql
@@ -2,8 +2,10 @@ ALTER TABLE `zt_bug`
 CHANGE `injection` `injection` varchar(30) NOT NULL DEFAULT '',
 CHANGE `identify` `identify` varchar(30) NOT NULL DEFAULT '';
 
+ALTER TABLE `zt_task` MODIFY `path` varchar(255) NOT NULL DEFAULT '';
+
 CREATE INDEX `parent` ON `zt_story` (`parent`);
-CREATE INDEX `path` ON `zt_task` (`path`(100));
+CREATE INDEX `path` ON `zt_task` (`path`);
 
 UPDATE `zt_project` SET `workflowGroup` = (SELECT `id` FROM `zt_workflowgroup` WHERE `code` = 'kanbanproduct' AND `main` = '1' LIMIT 1) WHERE `type` = 'project' AND `model` = 'kanban' AND `hasProduct` = '1';
 UPDATE `zt_project` SET `workflowGroup` = (SELECT `id` FROM `zt_workflowgroup` WHERE `code` = 'kanbanproject' AND `main` = '1' LIMIT 1) WHERE `type` = 'project' AND `model` = 'kanban' AND `hasProduct` = '0';
diff --git a/db/zentao.sql b/db/zentao.sql
index 0da7a8f647..d5177c01c5 100755
--- a/db/zentao.sql
+++ b/db/zentao.sql
@@ -2079,7 +2079,7 @@ CREATE TABLE IF NOT EXISTS `zt_task` (
   `parent` mediumint(8) NOT NULL DEFAULT '0',
   `isParent` tinyint(1) NOT NULL DEFAULT '0',
   `isTpl` tinyint(1) unsigned NOT NULL DEFAULT '0',
-  `path` text NULL,
+  `path` varchar(255) NOT NULL DEFAULT '',
   `execution` mediumint(8) unsigned NOT NULL DEFAULT '0',
   `module` mediumint(8) unsigned NOT NULL DEFAULT '0',
   `design` mediumint(8) unsigned NOT NULL DEFAULT '0',
@@ -2139,7 +2139,7 @@ CREATE TABLE IF NOT EXISTS `zt_task` (
 CREATE INDEX `execution` ON `zt_task` (`execution`);
 CREATE INDEX `story` ON `zt_task` (`story`);
 CREATE INDEX `parent` ON `zt_task` (`parent`);
-CREATE INDEX `path` ON `zt_task` (`path`(100));
+CREATE INDEX `path` ON `zt_task` (`path`);
 CREATE INDEX `assignedTo` ON `zt_task` (`assignedTo`);
 CREATE INDEX `order` ON `zt_task` (`order`);