diff --git a/workflow/engine/config/schema.xml b/workflow/engine/config/schema.xml
index 79f64a862..4faf9f7ec 100755
--- a/workflow/engine/config/schema.xml
+++ b/workflow/engine/config/schema.xml
@@ -4088,9 +4088,9 @@
         <column name="APP_TITLE" type="VARCHAR" size="255" required="true" default=""/>
         <column name="APP_PRO_TITLE" type="VARCHAR" size="255" required="true" default=""/>
         <column name="APP_TAS_TITLE" type="VARCHAR" size="255" required="true" default=""/>
-        <column name="APP_CREATE_DATE" type="TIMESTAMP" required="true"/>
-        <column name="APP_UPDATE_DATE" type="TIMESTAMP" required="true"/>
-        <column name="APP_FINISH_DATE" type="TIMESTAMP" required="true"/>
+        <column name="APP_CREATE_DATE" type="TIMESTAMP" required="false"/>
+        <column name="APP_UPDATE_DATE" type="TIMESTAMP" required="false"/>
+        <column name="APP_FINISH_DATE" type="TIMESTAMP" required="false"/>
         <column name="APP_STATUS" type="VARCHAR" size="100" required="true" default=""/>
         <column name="DEL_INDEX" type="INTEGER" required="true" default="0"/>
         <column name="DEL_PREVIOUS_USR_UID" type="VARCHAR" size="32" default=""/>
diff --git a/workflow/engine/data/mysql/schema.sql b/workflow/engine/data/mysql/schema.sql
index 869a44980..11c145ed6 100755
--- a/workflow/engine/data/mysql/schema.sql
+++ b/workflow/engine/data/mysql/schema.sql
@@ -2316,9 +2316,9 @@ CREATE TABLE `LIST_MY_INBOX`
 	`APP_TITLE` VARCHAR(255) default '' NOT NULL,
 	`APP_PRO_TITLE` VARCHAR(255) default '' NOT NULL,
 	`APP_TAS_TITLE` VARCHAR(255) default '' NOT NULL,
-	`APP_CREATE_DATE` DATETIME  NOT NULL,
-	`APP_UPDATE_DATE` DATETIME  NOT NULL,
-	`APP_FINISH_DATE` DATETIME  NOT NULL,
+	`APP_CREATE_DATE` DATETIME,
+	`APP_UPDATE_DATE` DATETIME,
+	`APP_FINISH_DATE` DATETIME,
 	`APP_STATUS` VARCHAR(100) default '' NOT NULL,
 	`DEL_INDEX` INTEGER default 0 NOT NULL,
 	`DEL_PREVIOUS_USR_UID` VARCHAR(32) default '',