Index: branches/RC/core/install/upgrades.sql
===================================================================
diff -u -N -r11623 -r11635
--- branches/RC/core/install/upgrades.sql	(.../upgrades.sql)	(revision 11623)
+++ branches/RC/core/install/upgrades.sql	(.../upgrades.sql)	(revision 11635)
@@ -972,7 +972,7 @@
 
 CREATE TABLE MailingLists (
   MailingId int(10) unsigned NOT NULL auto_increment,
-  PortalUserId int(11) NOT NULL,
+  PortalUserId int(11) NOT NULL default '-1',
   `To` longtext,
   ToParsed longtext,
   Attachments text,