Index: branches/RC/core/install/upgrades.php
===================================================================
diff -u -N -r9976 -r9986
--- branches/RC/core/install/upgrades.php	(.../upgrades.php)	(revision 9976)
+++ branches/RC/core/install/upgrades.php	(.../upgrades.php)	(revision 9986)
@@ -166,6 +166,14 @@
 		{
 			
 		}
+		
+		function Upgrade_4_2_2($mode)
+		{
+			if ($mode == 'before') {
+				if ($this->Conn->GetOne('SELECT LanguageId FROM '.TABLE_PREFIX.'Language WHERE PrimaryLang = 1')) return ;
+				$this->Conn->Query('UPDATE '.TABLE_PREFIX.'Language SET PrimaryLang = 1 ORDER BY LanguageId LIMIT 1');
+			}
+		}
 
 	}