From c6004ab0e0973db292222dce3b26a37f9dc1327b Mon Sep 17 00:00:00 2001
From: Mars Liu <mars.liu@outlook.com>
Date: Wed, 24 Nov 2021 02:59:55 +0800
Subject: [PATCH] fixed odd orders

---
 src/tree.py | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/tree.py b/src/tree.py
index 9dc5fe2..bb8e879 100644
--- a/src/tree.py
+++ b/src/tree.py
@@ -247,8 +247,12 @@ class TreeWalker:
         return config
 
     def ensure_node_id(self, config):
-        if "node_id" not in config:
-            config["node_id"] = self.gen_node_id()
+        if "node_id" not in config or \
+                not config["node_id"].startswith(f"{self.tree}-") or \
+                config["node_id"] in id_set:
+            new_id = self.gen_node_id()
+            id_set.add(new_id)
+            config["node_id"] = new_id
             return True, config
         else:
             return False, config
-- 
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