Merge PR #770 into 16.0

Signed-off-by legalsylvain

bi_sql_editor/models/bi_sql_view.py

@@ -263,6 +263,7 @@ class BiSQLView(models.Model):
                     "If you want to delete them, first set them to draft."
                 )
             )
+        if self.cron_id:
             self.cron_id.unlink()
         return super().unlink()