Index: branches/5.2.x/core/install/upgrades.sql
===================================================================
diff -u -N -r16279 -r16468
--- branches/5.2.x/core/install/upgrades.sql	(.../upgrades.sql)	(revision 16279)
+++ branches/5.2.x/core/install/upgrades.sql	(.../upgrades.sql)	(revision 16468)
@@ -2934,3 +2934,4 @@
 WHERE TemplateName LIKE 'USER%';
 
 UPDATE SystemSettings SET VariableValue = 1 WHERE VariableName = 'CSVExportEncoding';
+ALTER TABLE Semaphores ADD MainIDs INT NULL DEFAULT NULL AFTER MainPrefix;