diff --git a/src/calibre/gui2/library/delegates.py b/src/calibre/gui2/library/delegates.py
index d8ea501c9b..83a8797e21 100644
--- a/src/calibre/gui2/library/delegates.py
+++ b/src/calibre/gui2/library/delegates.py
@@ -209,7 +209,7 @@ class StyledItemDelegate(QStyledItemDelegate):
 
     def createEditor(self, parent, option, index):
         e = self.create_editor(parent, option, index)
-        if (book_id := index.data(Qt.ItemDataRole.UserRole)) and isinstance(book_id, int):
+        if e is not None and (book_id := index.data(Qt.ItemDataRole.UserRole)) and isinstance(book_id, int):
             setattr(e, 'underlying_book_id', book_id)
         return e