diff --git a/workflow/engine/config/schema.xml b/workflow/engine/config/schema.xml
index 7764f6ae5..11030f76d 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=""/>