Index: branches/5.0.x/core/install/upgrades.sql
===================================================================
diff -u -r12249 -r12264
--- branches/5.0.x/core/install/upgrades.sql	(.../upgrades.sql)	(revision 12249)
+++ branches/5.0.x/core/install/upgrades.sql	(.../upgrades.sql)	(revision 12264)
@@ -1432,4 +1432,7 @@
 
 UPDATE ConfigurationAdmin SET DisplayOrder = DisplayOrder - 0.01 WHERE VariableName IN ('UseModRewrite', 'cms_DefaultDesign', 'ErrorTemplate' 'NoPermissionTemplate', 'UsePageHitCounter', 'ForceImageMagickResize', 'CheckStopWords');
 
+ALTER TABLE ConfigurationAdmin CHANGE validation Validation TEXT NULL DEFAULT NULL;
+UPDATE ConfigurationAdmin SET Validation = 'a:3:{s:4:"type";s:3:"int";s:13:"min_value_inc";i:1;s:8:"required";i:1;}' WHERE VariableName = 'SessionTimeout';
+
 UPDATE Modules SET Version = '5.0.1', Loaded = 1 WHERE Name = 'In-Portal';
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