chore: linter
diff --git a/erpnext/controllers/subcontracting_controller.py b/erpnext/controllers/subcontracting_controller.py
index a588847..a9561fe 100644
--- a/erpnext/controllers/subcontracting_controller.py
+++ b/erpnext/controllers/subcontracting_controller.py
@@ -74,19 +74,25 @@
 			)
 
 			if not is_stock_item:
-				frappe.throw(_(f"Row {item.idx}: Item {item.item_name} must be a stock item."))
+				frappe.throw(_("Row {0}: Item {1} must be a stock item.").format(item.idx, item.item_name))
 
 			if not is_sub_contracted_item:
-				frappe.throw(_(f"Row {item.idx}: Item {item.item_name} must be a subcontracted item."))
+				frappe.throw(
+					_("Row {0}: Item {1} must be a subcontracted item.").format(item.idx, item.item_name)
+				)
 
 			if item.bom:
 				bom = frappe.get_doc("BOM", item.bom)
 				if not bom.is_active:
-					frappe.throw(_(f"Row {item.idx}: Please select an active BOM for Item {item.item_name}."))
+					frappe.throw(
+						_("Row {0}: Please select an active BOM for Item {1}.").format(item.idx, item.item_name)
+					)
 				if bom.item != item.item_code:
-					frappe.throw(_(f"Row {item.idx}: Please select an valid BOM for Item {item.item_name}."))
+					frappe.throw(
+						_("Row {0}: Please select an valid BOM for Item {1}.").format(item.idx, item.item_name)
+					)
 			else:
-				frappe.throw(_(f"Row {item.idx}: Please select a BOM for Item {item.item_name}."))
+				frappe.throw(_("Row {0}: Please select a BOM for Item {1}.").format(item.idx, item.item_name))
 
 	def __get_data_before_save(self):
 		item_dict = {}
diff --git a/erpnext/subcontracting/doctype/subcontracting_receipt/subcontracting_receipt.py b/erpnext/subcontracting/doctype/subcontracting_receipt/subcontracting_receipt.py
index dd4ae04..7e1915b 100644
--- a/erpnext/subcontracting/doctype/subcontracting_receipt/subcontracting_receipt.py
+++ b/erpnext/subcontracting/doctype/subcontracting_receipt/subcontracting_receipt.py
@@ -199,7 +199,7 @@
 		for item in self.items:
 			if not (item.qty or item.rejected_qty):
 				frappe.throw(
-					_(f"Row {item.idx}: Accepted Qty and Rejected Qty can't be zero at the same time.")
+					_("Row {0}: Accepted Qty and Rejected Qty can't be zero at the same time.").format(item.idx)
 				)
 
 	def set_items_bom(self):