Index: trunk/data/validator/deprecated.mapcss
===================================================================
--- trunk/data/validator/deprecated.mapcss	(revision 14815)
+++ trunk/data/validator/deprecated.mapcss	(revision 14867)
@@ -1389,2 +1389,10 @@
   group: tr("deprecated tagging");
 }
+
+/* #17249 */
+*[religion=unitarian] {
+  throwWarning: tr("{0} is deprecated", "{0.tag}");
+  suggestAlternative: "religion=unitarian_universalist";
+  fixAdd: "religion=unitarian_universalist";
+  group: tr("deprecated tagging");
+}