From 99ca0a7654a918fd0cf51ddeacd6a1a65ee6563e Mon Sep 17 00:00:00 2001
From: Philip Sargent <philip.sargent@gmail.com>
Date: Tue, 19 May 2026 12:50:43 +0100
Subject: [PATCH] bugfix

---
 parsers/caves.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/parsers/caves.py b/parsers/caves.py
index 426eb437..1bbfe042 100644
--- a/parsers/caves.py
+++ b/parsers/caves.py
@@ -619,7 +619,8 @@ def make_cave(slug):
         for k in kaves:
             if k.slug() is not None:
                 print(" ! - OVERWRITING this one: slug:" + str(k.slug()))
-                k.notes = "DUPLICATE kataster number found on import. Please fix\n" + k.notes
+                current_notes = k.notes or ""
+                k.notes = "DUPLICATE kataster number found on import. Please fix\n" + current_notes
                 cave = k
     return cave