From 83df61018f2daac10661475227f834ea965783fb Mon Sep 17 00:00:00 2001
From: GogoVega <92022724+GogoVega@users.noreply.github.com>
Date: Mon, 22 Sep 2025 09:53:09 +0200
Subject: [PATCH] Fix undo node output changes inside a Subflow

---
 .../node_modules/@node-red/editor-client/src/js/ui/editor.js    | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/node_modules/@node-red/editor-client/src/js/ui/editor.js b/packages/node_modules/@node-red/editor-client/src/js/ui/editor.js
index 70963e389..f804e6de2 100644
--- a/packages/node_modules/@node-red/editor-client/src/js/ui/editor.js
+++ b/packages/node_modules/@node-red/editor-client/src/js/ui/editor.js
@@ -1179,7 +1179,7 @@ RED.editor = (function() {
                             if (editState.outputMap) {
                                 historyEvent.outputMap = editState.outputMap;
                             }
-                            if (subflowInstances) {
+                            if (subflowInstances && subflowInstances.length) {
                                 historyEvent.subflow = {
                                     instances:subflowInstances
                                 }