Index: trunk/data/validator/combinations.mapcss
===================================================================
--- trunk/data/validator/combinations.mapcss	(revision 14818)
+++ trunk/data/validator/combinations.mapcss	(revision 14830)
@@ -547,2 +547,9 @@
   throwOther: tr("{0} together with {1}. Tag each hydrant separately.", "{0.tag}", "{1.tag}");
 }
+
+/* #12502 */
+node[leisure=park][natural=tree] {
+  throwWarning: tr("{0} together with {1} on a node. Remove {0}.", "{0.tag}", "{1.tag}");
+  group: tr("suspicious tag combination");
+  fixRemove: "leisure";
+}