diff --git a/symmetric/src/main/resources/ddl-config.xml b/symmetric/src/main/resources/ddl-config.xml
index 9bf1e16f04..562674be70 100644
--- a/symmetric/src/main/resources/ddl-config.xml
+++ b/symmetric/src/main/resources/ddl-config.xml
@@ -138,9 +138,9 @@
         <column name="node_id" type="VARCHAR" size="50" required="true" primaryKey="true" />
         <column name="password" type="VARCHAR" size="50" required="true" />
         <column name="registration_enabled" type="BOOLEANINT" size="1" default="0" />
-        <column name="registration_time" type="TIMESTAMP" />
+        <column name="registration_time" type="TIMESTAMP" required="false" />
         <column name="initial_load_enabled" type="BOOLEANINT" size="1" default="0" />
-        <column name="initial_load_time" type="TIMESTAMP" />
+        <column name="initial_load_time" type="TIMESTAMP" required="false" />
         <foreign-key name="fk_cs_node_id" foreignTable="node">
             <reference local="node_id" foreign="node_id" />
         </foreign-key>