From 29595044705805fa0906d90318a05b0514936deb Mon Sep 17 00:00:00 2001
From: Philipinho <16838612+Philipinho@users.noreply.github.com>
Date: Mon, 29 Jun 2026 19:02:21 +0100
Subject: [PATCH] fix tree merge

---
 apps/client/src/features/page/tree/utils/utils.ts | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/apps/client/src/features/page/tree/utils/utils.ts b/apps/client/src/features/page/tree/utils/utils.ts
index 71a2b26ce..ac9c70565 100644
--- a/apps/client/src/features/page/tree/utils/utils.ts
+++ b/apps/client/src/features/page/tree/utils/utils.ts
@@ -203,7 +203,14 @@ export function mergeRootTrees(
   prevRoots: SpaceTreeNode[],
   incomingRoots: SpaceTreeNode[],
 ): SpaceTreeNode[] {
-  const seen = new Set(prevRoots.map((r) => r.id));
+  const seen = new Set<string>();
+  const collect = (nodes: SpaceTreeNode[]) => {
+    for (const node of nodes) {
+      seen.add(node.id);
+      if (node.children?.length) collect(node.children);
+    }
+  };
+  collect(prevRoots);
 
   // add new roots that were not present before
   const merged = [...prevRoots];