X-Git-Url: https://git.mdrn.pl/wolnelektury.git/blobdiff_plain/fa5a185ce54eb7bacaadc34f05abb63e701d39d8..145e56d0df5162f8b57574e5b5656c6354274280:/apps/catalogue/models.py

diff --git a/apps/catalogue/models.py b/apps/catalogue/models.py
index ef923fa08..34c1d0b23 100644
--- a/apps/catalogue/models.py
+++ b/apps/catalogue/models.py
@@ -562,7 +562,7 @@ class Book(models.Model):
                     tag.save()
                 book_tags.append(tag)
 
-        book.tags = book_tags + book_shelves
+        book.tags = set(book_tags + book_shelves)
 
         book_tag = book.book_tag()