Index: trunk/src/org/openstreetmap/josm/data/validation/tests/MultipolygonTest.java
===================================================================
--- trunk/src/org/openstreetmap/josm/data/validation/tests/MultipolygonTest.java	(revision 12904)
+++ trunk/src/org/openstreetmap/josm/data/validation/tests/MultipolygonTest.java	(revision 12905)
@@ -224,5 +224,5 @@
                                     .build());
                         } else if (areaStyle) { /* style on outer way of multipolygon, but equal to polygon */
-                            errors.add(TestError.builder(this, Severity.ERROR, OUTER_STYLE)
+                            errors.add(TestError.builder(this, Severity.WARNING, OUTER_STYLE)
                                     .message(tr("Area style on outer way"))
                                     .primitives(Arrays.asList(r, wOuter))