diff --git a/_build/schema/versionx.mysql.schema.xml b/_build/schema/versionx.mysql.schema.xml
index ffb71dc..24e1671 100644
--- a/_build/schema/versionx.mysql.schema.xml
+++ b/_build/schema/versionx.mysql.schema.xml
@@ -46,7 +46,7 @@
             deltas that were merged.
             -->
         <field key="time_start" dbtype="timestamp" phptype="timestamp" null="false" default="CURRENT_TIMESTAMP" />
-        <field key="time_end" dbtype="timestamp" phptype="timestamp" null="false" default="CURRENT_TIMESTAMP" />
+        <field key="time_end" dbtype="timestamp" phptype="timestamp" null="false" />
 
         <index alias="principal_class" name="principal_class" primary="false" unique="false" type="BTREE">
             <column key="principal_class" length="" collation="A" null="false" />
diff --git a/core/components/versionx/model/versionx/mysql/vxdelta.map.inc.php b/core/components/versionx/model/versionx/mysql/vxdelta.map.inc.php
index 4f66f65..e6125b0 100644
--- a/core/components/versionx/model/versionx/mysql/vxdelta.map.inc.php
+++ b/core/components/versionx/model/versionx/mysql/vxdelta.map.inc.php
@@ -37,7 +37,7 @@
     'type_class' => NULL,
     'milestone' => '',
     'time_start' => 'CURRENT_TIMESTAMP',
-    'time_end' => 'CURRENT_TIMESTAMP',
+    'time_end' => NULL,
   ),
   'fieldMeta' => 
   array (
@@ -92,7 +92,6 @@
       'dbtype' => 'timestamp',
       'phptype' => 'timestamp',
       'null' => false,
-      'default' => 'CURRENT_TIMESTAMP',
     ),
   ),
   'indexes' =>