chore(deploy): synchronize phase3 unified database migration

firstleg/src/main/resources/db/phase3-inbound-parent-child-schema.sql

@@ -119,6 +119,14 @@ BEGIN
   ) THEN
     ALTER TABLE fl_inbound_order DROP INDEX uk_inbound_one_child;
   END IF;
+  IF EXISTS (
+    SELECT 1 FROM information_schema.statistics
+     WHERE table_schema = DATABASE()
+       AND table_name = 'fl_inbound_order'
+       AND index_name = 'uk_inbound_one_secondary'
+  ) THEN
+    ALTER TABLE fl_inbound_order DROP INDEX uk_inbound_one_secondary;
+  END IF;
 END$$
 DELIMITER ;
 CALL phase3_inbound_drop_legacy_index();