diff --git a/conf/db/upgrade/V5.5.12.1__schema.sql b/conf/db/upgrade/V5.5.12.1__schema.sql
new file mode 100644
index 00000000000..8c5ba872a20
--- /dev/null
+++ b/conf/db/upgrade/V5.5.12.1__schema.sql
@@ -0,0 +1,4 @@
+-- ZSTAC-83966: Add hidden field to AlarmVO/EventSubscriptionVO/ActiveAlarmVO for soft-hide support
+CALL ADD_COLUMN('AlarmVO', 'hidden', 'TINYINT(1)', 0, '0');
+CALL ADD_COLUMN('EventSubscriptionVO', 'hidden', 'TINYINT(1)', 0, '0');
+CALL ADD_COLUMN('ActiveAlarmVO', 'hidden', 'TINYINT(1)', 0, '0');