fix: remove unused format from query
doctype is not used in query and parent alone is enough to identify
packed items.
diff --git a/erpnext/controllers/sales_and_purchase_return.py b/erpnext/controllers/sales_and_purchase_return.py
index 01486fc..f673a9b 100644
--- a/erpnext/controllers/sales_and_purchase_return.py
+++ b/erpnext/controllers/sales_and_purchase_return.py
@@ -63,7 +63,7 @@
if doc.doctype in ("Delivery Note", "Sales Invoice"):
for d in frappe.db.sql("""select item_code, qty, serial_no, batch_no from `tabPacked Item`
- where parent = %s""".format(doc.doctype), doc.return_against, as_dict=1):
+ where parent = %s""", doc.return_against, as_dict=1):
valid_items = get_ref_item_dict(valid_items, d)
already_returned_items = get_already_returned_items(doc)