diff --git a/erpnext/stock/doctype/stock_entry/stock_entry.py b/erpnext/stock/doctype/stock_entry/stock_entry.py
index f1df54d..a9176a9 100644
--- a/erpnext/stock/doctype/stock_entry/stock_entry.py
+++ b/erpnext/stock/doctype/stock_entry/stock_entry.py
@@ -1980,23 +1980,30 @@
 		):
 
 			# Get PO Supplied Items Details
-			item_wh = frappe._dict(
-				frappe.db.sql(
-					"""
-				select rm_item_code, reserve_warehouse
-				from `tabPurchase Order` po, `tabPurchase Order Item Supplied` poitemsup
-				where po.name = poitemsup.parent
-				and po.name = %s""",
-					self.purchase_order,
-				)
+			po_supplied_items = frappe.db.get_all(
+				"Purchase Order Item Supplied",
+				filters={"parent": self.purchase_order},
+				fields=["name", "rm_item_code", "reserve_warehouse"],
 			)
 
+			# Get Items Supplied in Stock Entries against PO
 			supplied_items = get_supplied_items(self.purchase_order)
-			for name, item in supplied_items.items():
-				frappe.db.set_value("Purchase Order Item Supplied", name, item)
 
-			# Update reserved sub contracted quantity in bin based on Supplied Item Details and
+			for row in po_supplied_items:
+				key, item = row.name, {}
+				if not supplied_items.get(key):
+					# no stock transferred against PO Supplied Items row
+					item = {"supplied_qty": 0, "returned_qty": 0, "total_supplied_qty": 0}
+				else:
+					item = supplied_items.get(key)
+
+				frappe.db.set_value("Purchase Order Item Supplied", row.name, item)
+
+			# RM Item-Reserve Warehouse Dict
+			item_wh = {x.get("rm_item_code"): x.get("reserve_warehouse") for x in po_supplied_items}
+
 			for d in self.get("items"):
+				# Update reserved sub contracted quantity in bin based on Supplied Item Details and
 				item_code = d.get("original_item") or d.get("item_code")
 				reserve_warehouse = item_wh.get(item_code)
 				if not (reserve_warehouse and item_code):
diff --git a/erpnext/tests/test_subcontracting.py b/erpnext/tests/test_subcontracting.py
index bf12181..93d1c8e 100644
--- a/erpnext/tests/test_subcontracting.py
+++ b/erpnext/tests/test_subcontracting.py
@@ -879,6 +879,55 @@
 		for key, value in get_supplied_items(pr1).items():
 			self.assertEqual(value.qty, 2)
 
+	def test_po_supplied_qty(self):
+		"""
+		Check if 'Supplied Qty' in PO's Supplied Items table is reset on submit/cancel.
+		"""
+		set_backflush_based_on("Material Transferred for Subcontract")
+		items = [
+			{
+				"warehouse": "_Test Warehouse - _TC",
+				"item_code": "Subcontracted Item SA1",
+				"qty": 5,
+				"rate": 100,
+			},
+			{
+				"warehouse": "_Test Warehouse - _TC",
+				"item_code": "Subcontracted Item SA5",
+				"qty": 6,
+				"rate": 100,
+			},
+		]
+
+		rm_items = [
+			{"item_code": "Subcontracted SRM Item 1", "qty": 5, "main_item_code": "Subcontracted Item SA1"},
+			{"item_code": "Subcontracted SRM Item 2", "qty": 5, "main_item_code": "Subcontracted Item SA1"},
+			{"item_code": "Subcontracted SRM Item 3", "qty": 5, "main_item_code": "Subcontracted Item SA1"},
+			{"item_code": "Subcontracted SRM Item 5", "qty": 6, "main_item_code": "Subcontracted Item SA5"},
+			{"item_code": "Subcontracted SRM Item 4", "qty": 6, "main_item_code": "Subcontracted Item SA5"},
+		]
+
+		itemwise_details = make_stock_in_entry(rm_items=rm_items)
+		po = create_purchase_order(
+			rm_items=items, is_subcontracted=1, supplier_warehouse="_Test Warehouse 1 - _TC"
+		)
+
+		for d in rm_items:
+			d["po_detail"] = po.items[0].name if d.get("qty") == 5 else po.items[1].name
+
+		se = make_stock_transfer_entry(
+			po_no=po.name, rm_items=rm_items, itemwise_details=copy.deepcopy(itemwise_details)
+		)
+
+		po.reload()
+		for row in po.get("supplied_items"):
+			self.assertIn(row.supplied_qty, [5.0, 6.0])
+
+		se.cancel()
+		po.reload()
+		for row in po.get("supplied_items"):
+			self.assertEqual(row.supplied_qty, 0.0)
+
 
 def add_second_row_in_pr(pr):
 	item_dict = {}