From e48f1adbbb0d99c95fc5dc6fd3a08ca54b55595d Mon Sep 17 00:00:00 2001
From: Paul Davis <paul@linuxaudiosystems.com>
Date: Mon, 7 Apr 2025 11:13:31 -0600
Subject: [PATCH] clear pianoroll undo/redo history when resetting the region
 it is using

---
 gtk2_ardour/pianoroll.cc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/gtk2_ardour/pianoroll.cc b/gtk2_ardour/pianoroll.cc
index c854216b6c..4af56fcf32 100644
--- a/gtk2_ardour/pianoroll.cc
+++ b/gtk2_ardour/pianoroll.cc
@@ -2321,6 +2321,7 @@ Pianoroll::set (TriggerReference & tref)
 void
 Pianoroll::unset ()
 {
+	_history.clear ();
 	_update_connection.disconnect();
 	object_connections.drop_connections ();
 	_track.reset ();