Index: branches/5.0.x/core/units/logs/session_logs/session_logs_config.php
===================================================================
diff -u -N -r12497 -r12703
--- branches/5.0.x/core/units/logs/session_logs/session_logs_config.php	(.../session_logs_config.php)	(revision 12497)
+++ branches/5.0.x/core/units/logs/session_logs/session_logs_config.php	(.../session_logs_config.php)	(revision 12703)
@@ -1,6 +1,6 @@
 <?php
 /**
-* @version	$Id: session_logs_config.php 12497 2009-09-15 16:17:08Z alex $
+* @version	$Id: session_logs_config.php 12703 2009-10-20 08:17:55Z alex $
 * @package	In-Portal
 * @copyright	Copyright (C) 1997 - 2009 Intechnic. All rights reserved.
 * @license      GNU/GPL
@@ -92,14 +92,14 @@
 		    	'use_phrases' => 1,
 		    	'not_null' => 1, 'default' => 1
 		    ),
-		    'SessionStart' => Array ('type' => 'int', 'formatter' => 'kDateFormatter', 'not_null' => 1, 'time_format' => 'H:i:s', 'default' => 0),
+		    'SessionStart' => Array ('type' => 'int', 'formatter' => 'kDateFormatter', 'time_format' => 'H:i:s', 'default' => NULL),
 		    'SessionEnd' => Array ('type' => 'int', 'formatter' => 'kDateFormatter', 'time_format' => 'H:i:s', 'default' => NULL),
 		    'IP' => Array ('type' => 'string', 'max_len' => 15, 'not_null' => 1, 'default' => ''),
 		    'AffectedItems' => Array ('type' => 'int', 'not_null' => 1, 'default' => 0),
 		),
 
 		'VirtualFields' => Array(
-			'Duration' => Array ('type' => 'int', 'formatter' => 'kDateFormatter', 'not_null' => 1, 'date_format' => '', 'time_format' => 'H:i:s', 'use_timezone' => false, 'default' => 0),
+			'Duration' => Array ('type' => 'int', 'formatter' => 'kDateFormatter', 'date_format' => '', 'time_format' => 'H:i:s', 'use_timezone' => false, 'default' => NULL),
 		),
 
 		'Grids' => Array (