restrict max admin_level when patching in tag changes into placex

sql/functions.sql

@@ -2251,7 +2251,7 @@ BEGIN
       country_code = NEW.country_code,
       parent_place_id = null,
       extratags = NEW.extratags,
-      admin_level = NEW.admin_level,
+      admin_level = CASE WHEN NEW.admin_level > 15 THEN 15 ELSE NEW.admin_level END,
       indexed_status = 2,    
       geometry = NEW.geometry
       where place_id = existingplacex.place_id;