diff --git a/erpnext/manufacturing/report/work_order_stock_report/test_work_order_stock_report.py b/erpnext/manufacturing/report/work_order_stock_report/test_work_order_stock_report.py
index 9c04452e44e..6db8b470643 100644
--- a/erpnext/manufacturing/report/work_order_stock_report/test_work_order_stock_report.py
+++ b/erpnext/manufacturing/report/work_order_stock_report/test_work_order_stock_report.py
@@ -22,3 +22,48 @@ class TestWorkOrderStockReport(ERPNextTestSuite):
 
 		self.assertTrue(columns)
 		self.assertIn(wo.name, {row["work_order"] for row in data})
+
+	def test_item_listed_twice_in_bom_is_counted_once(self):
+		# A BOM may list the same raw item on multiple lines at different qty (validate_materials does
+		# not dedupe). get_item_list aggregates the qty columns and groups by item_code only, so the
+		# report stays one row per item — matching the original MariaDB output. The pre-fix multi-column
+		# GROUP BY split such an item into one row per distinct stock_qty, inflating "# Req'd Items".
+		from erpnext.manufacturing.doctype.production_plan.test_production_plan import make_bom
+		from erpnext.manufacturing.doctype.work_order.test_work_order import make_wo_order_test_record
+		from erpnext.manufacturing.report.work_order_stock_report.work_order_stock_report import execute
+		from erpnext.stock.doctype.item.test_item import make_item
+
+		fg_item = make_item("_Test WO Stock Dup FG", {"is_stock_item": 1}).name
+		rm_item = "_Test Item"
+
+		bom = make_bom(item=fg_item, raw_materials=[rm_item], rm_qty=1, currency="INR", do_not_save=True)
+		# a second line for the same raw item at a different qty -> a different stock_qty
+		first = bom.items[0]
+		bom.append(
+			"items",
+			{
+				"item_code": rm_item,
+				"qty": 2,
+				"uom": first.uom,
+				"stock_uom": first.stock_uom,
+				"rate": first.rate,
+			},
+		)
+		bom.insert(ignore_permissions=True)
+		bom.submit()
+
+		wo = make_wo_order_test_record(
+			production_item=fg_item,
+			bom_no=bom.name,
+			qty=1,
+			source_warehouse="_Test Warehouse - _TC",
+			skip_transfer=1,
+		)
+
+		columns, data = execute(frappe._dict(warehouse="_Test Warehouse - _TC"))
+
+		wo_rows = [row for row in data if row["work_order"] == wo.name]
+		self.assertTrue(wo_rows)
+		# the duplicated raw item must be counted once per work order item, not once per BOM line
+		for row in wo_rows:
+			self.assertEqual(row["req_items"], 1)