diff --git a/openbsc/src/vty_interface_layer3.c b/openbsc/src/vty_interface_layer3.c
index bf88fc0..b5af0ab 100644
--- a/openbsc/src/vty_interface_layer3.c
+++ b/openbsc/src/vty_interface_layer3.c
@@ -485,6 +485,9 @@
 		return CMD_WARNING;
 	}
 
+	/* the last tuple probably invalid with the new auth settings */
+	db_sync_lastauthtuple_for_subscr(NULL, subscr);
+
 	return rc ? CMD_WARNING : CMD_SUCCESS;
 }