Index: branches/5.1.x/units/links/links_config.php
===================================================================
diff -u -N -r13960 -r14006
--- branches/5.1.x/units/links/links_config.php	(.../links_config.php)	(revision 13960)
+++ branches/5.1.x/units/links/links_config.php	(.../links_config.php)	(revision 14006)
@@ -1,6 +1,6 @@
 <?php
 /**
-* @version	$Id: links_config.php 13960 2010-09-25 18:36:47Z alex $
+* @version	$Id: links_config.php 14006 2010-10-19 19:19:58Z alex $
 * @package	In-Link
 * @copyright	Copyright (C) 1997 - 2009 Intechnic. All rights reserved.
 * @license      GNU/GPL
@@ -463,7 +463,7 @@
 			            'CachedRating'		=>	Array ('type' => 'string', 'not_null' => 1, 'formatter' => 'kFormatter', 'default' => 0),
 			            'CachedVotesQty'	=>	Array ('type' => 'int', 'formatter' => 'kFormatter', 'not_null' => 1, 'default' => 0),
 			            'CachedReviewsQty'	=>	Array ('type' => 'int', 'not_null' => 1, 'default' => 0),
-			            'CreatedById'		=>	Array ('type' => 'int', 'formatter' => 'kLEFTFormatter', 'error_msgs' => Array ('invalid_option' => '!la_error_UserNotFound!'), 'options' => Array (USER_ROOT => 'root', USER_GUEST => 'Guest'), 'left_sql' => 'SELECT %s FROM '.TABLE_PREFIX.'PortalUser WHERE `%s` = \'%s\'', 'left_key_field' => 'PortalUserId', 'left_title_field' => 'Login', 'default' => NULL),
+			            'CreatedById'		=>	Array ('type' => 'int', 'formatter' => 'kLEFTFormatter', 'error_msgs' => Array ('invalid_option' => '!la_error_UserNotFound!'), 'options' => Array (USER_ROOT => 'root', USER_GUEST => 'Guest'), 'left_sql' => 'SELECT %s FROM '.TABLE_PREFIX.'PortalUser WHERE `%s` = \'%s\'', 'left_key_field' => 'PortalUserId', 'left_title_field' => 'Login', 'required' => 1, 'default' => NULL),
 			            'ModifiedById'		=>	Array ('type' => 'int', 'formatter' => 'kLEFTFormatter', 'error_msgs' => Array ('invalid_option' => '!la_error_UserNotFound!'), 'options' => Array (USER_ROOT => 'root', USER_GUEST => 'Guest'), 'left_sql' => 'SELECT %s FROM '.TABLE_PREFIX.'PortalUser WHERE `%s` = \'%s\'', 'left_key_field' => 'PortalUserId', 'left_title_field' => 'Login', 'default' => NULL),
 			            'Priority'			=>	Array ('type' => 'int', 'not_null' => 1, 'default' => 0),
 			            'Status'			=>	Array (