diff --git a/refact-agent/gui/src/features/Chat/Thread/reducer.ts b/refact-agent/gui/src/features/Chat/Thread/reducer.ts
index 0ecb5ad1f..a4af3238f 100644
--- a/refact-agent/gui/src/features/Chat/Thread/reducer.ts
+++ b/refact-agent/gui/src/features/Chat/Thread/reducer.ts
@@ -379,9 +379,9 @@ function applyRestoredThread(
       payload.last_user_message_id,
       existing.last_user_message_id,
     ),
-    parent_id: valueOrExisting(payload.parent_id, existing.parent_id),
-    link_type: valueOrExisting(payload.link_type, existing.link_type),
-    root_chat_id: valueOrExisting(payload.root_chat_id, existing.root_chat_id),
+    parent_id: payload.parent_id ?? existing.parent_id,
+    link_type: payload.link_type ?? existing.link_type,
+    root_chat_id: payload.root_chat_id ?? existing.root_chat_id,
     worktree: valueOrExisting(payload.worktree, existing.worktree),
     task_meta: valueOrExisting(payload.task_meta, existing.task_meta),
     is_task_chat: valueOrExisting(payload.is_task_chat, existing.is_task_chat),