Index: branches/5.3.x/core/install/upgrades.sql
===================================================================
diff -u -N -r15999 -r16045
--- branches/5.3.x/core/install/upgrades.sql	(.../upgrades.sql)	(revision 15999)
+++ branches/5.3.x/core/install/upgrades.sql	(.../upgrades.sql)	(revision 16045)
@@ -2993,6 +2993,7 @@
 ALTER TABLE CategoryItems ADD Id int(11) NOT NULL auto_increment FIRST, ADD PRIMARY KEY (Id);
 ALTER TABLE UserGroupRelations DROP PRIMARY KEY;
 ALTER TABLE UserGroupRelations ADD Id int(11) NOT NULL auto_increment FIRST, ADD PRIMARY KEY (Id), ADD UNIQUE KEY UserGroup (PortalUserId, GroupId);
+DELETE FROM UserPersistentSessionData WHERE VariableName IN ('u-ug[Default]columns_.', 'g-ug[Default]columns_.');
 ALTER TABLE SpamControl ADD Id int(11) NOT NULL auto_increment FIRST, ADD PRIMARY KEY (Id);
 
 INSERT INTO SystemSettings VALUES(DEFAULT, 'SSLDomain', '', 'In-Portal', 'in-portal:configure_advanced', 'la_section_SettingsSSL', 'la_config_SSLDomain', 'text', '', '', 30.01, 0, 1, NULL);