--- trunk/Estraier.pm	2006/01/04 15:28:39	9
+++ trunk/Estraier.pm	2006/01/04 15:48:00	10
@@ -210,6 +210,8 @@
 		delete($self->{$data});
 	}
 
+	$self->{id} = -1;
+
 	return 1;
 }