From 14f2c24a604e36cad62ba9f6f8d71bf500f8e35a Mon Sep 17 00:00:00 2001
From: Radek Czajka <rczajka@rczajka.pl>
Date: Tue, 26 Sep 2023 13:53:14 +0200
Subject: [PATCH] fix for isbn import

---
 src/isbn/models.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/isbn/models.py b/src/isbn/models.py
index 14e973d8..43d01bfc 100644
--- a/src/isbn/models.py
+++ b/src/isbn/models.py
@@ -142,7 +142,7 @@ class Isbn(models.Model):
                     add_note = False
                     if isbn.book is None:
                         isbn.book = catalogue_book
-                    elif isbn.book is not catalogue_book:
+                    elif isbn.book != catalogue_book:
                         add_note = True
                     if not isbn.form:
                         isbn.form = form
-- 
2.20.1