--- a/UIObjectView.st	Wed Feb 09 16:47:42 2000 +0100
+++ b/UIObjectView.st	Wed Feb 09 16:48:15 2000 +0100
@@ -2392,7 +2392,11 @@
 resetModification
     "set modification state to false
     "
-    startIdentifier := identifier
+"/    startIdentifier := identifier
+
+    identifier := startIdentifier := 0.
+    history    := OrderedCollection new.
+
 ! !
 
 !UIObjectView::UndoHistory methodsFor:'activation'!