Index: trunk/core/units/relationship/relationship_config.php
===================================================================
diff -u -N -r7867 -r7997
--- trunk/core/units/relationship/relationship_config.php	(.../relationship_config.php)	(revision 7867)
+++ trunk/core/units/relationship/relationship_config.php	(.../relationship_config.php)	(revision 7997)
@@ -78,8 +78,8 @@
 					
 					'Fields'			=>	Array(
 											    'RelationshipId'	=>	Array('type' => 'int', 'not_null' => 1, 'default' => 0),
-												'SourceId'			=>	Array('type'=>'int', 'required' => 1, 'default' => 0),
-												'TargetId'			=>	Array('type'=>'int', 'required' => 1, 'default' => ''),
+												'SourceId'			=>	Array('type'=>'int', 'required' => 1, 'default' => NULL),
+												'TargetId'			=>	Array('type'=>'int', 'required' => 1, 'default' => NULL),
 												'SourceType'		=>	Array('type'=>'int','not_null'=>1,'default'=>0),
 												'TargetType'		=>	Array('type'=>'int','not_null'=>1,'default'=>0),
 												'Type'				=>	Array('type'=>'int','formatter'=>'kOptionsFormatter', 'required' => 1, 'options'=>Array(1=>'la_Reciprocal',0=>'la_OneWay'),'not_null'=>1,'default'=>0,'use_phrases'=>1),