Index: branches/RC/core/install/install_schema.sql
===================================================================
diff -u -N -r9419 -r10024
--- branches/RC/core/install/install_schema.sql	(.../install_schema.sql)	(revision 9419)
+++ branches/RC/core/install/install_schema.sql	(.../install_schema.sql)	(revision 10024)
@@ -138,9 +138,11 @@
 );
 
 CREATE TABLE PersistantSessionData (
+  VariableId bigint(20) NOT NULL auto_increment,
   PortalUserId int(11) NOT NULL default '0',
   VariableName varchar(255) NOT NULL default '',
   VariableValue text NOT NULL,
+  PRIMARY KEY  (VariableId),
   KEY UserId (PortalUserId),
   KEY VariableName (VariableName)
 );