X-Git-Url: https://git.mdrn.pl/redakcja.git/blobdiff_plain/21cd47e315b2e86edeff93bac5d1eca5b5d2c428..05a64b9314fac5f613133332d7d0b5b568ab8afc:/src/documents/models/book.py

diff --git a/src/documents/models/book.py b/src/documents/models/book.py
index e16de686..75e707e8 100644
--- a/src/documents/models/book.py
+++ b/src/documents/models/book.py
@@ -45,6 +45,7 @@ class Book(models.Model):
         models.DO_NOTHING,
         to_field='slug',
         null=True, blank=True,
+        db_constraint=False,
         editable=False, db_index=True,
         related_name='document_books',
         related_query_name='document_book',