diff --git a/erpnext/subcontracting/doctype/subcontracting_receipt/subcontracting_receipt.py b/erpnext/subcontracting/doctype/subcontracting_receipt/subcontracting_receipt.py
index b48fdfa6356..05fc9181e71 100644
--- a/erpnext/subcontracting/doctype/subcontracting_receipt/subcontracting_receipt.py
+++ b/erpnext/subcontracting/doctype/subcontracting_receipt/subcontracting_receipt.py
@@ -351,9 +351,12 @@ class SubcontractingReceipt(SubcontractingController):
 				supplied_items_details[item.name] = {}
 
 				for supplied_item in supplied_items:
+					if supplied_item.rm_item_code not in supplied_items_details[item.name]:
+						supplied_items_details[item.name][supplied_item.rm_item_code] = 0.0
+
 					supplied_items_details[item.name][
 						supplied_item.rm_item_code
-					] = supplied_item.available_qty
+					] += supplied_item.available_qty
 		else:
 			for item in self.get("supplied_items"):
 				item.available_qty_for_consumption = supplied_items_details.get(item.reference_name, {}).get(