diff --git a/erpnext/manufacturing/doctype/production_plan/production_plan.py b/erpnext/manufacturing/doctype/production_plan/production_plan.py
index 74ccdfd02aa..6173f40fb10 100644
--- a/erpnext/manufacturing/doctype/production_plan/production_plan.py
+++ b/erpnext/manufacturing/doctype/production_plan/production_plan.py
@@ -701,19 +701,21 @@ class ProductionPlan(Document):
 				"project": self.project,
 			}
 
-			key = (d.item_code, d.sales_order, d.sales_order_item, d.warehouse)
+			key = (d.item_code, d.sales_order, d.sales_order_item, d.warehouse, d.planned_start_date)
 			if self.combine_items:
-				key = (d.item_code, d.sales_order, d.warehouse)
+				key = (d.item_code, d.sales_order, d.warehouse, d.planned_start_date)
 
 			if not d.sales_order:
-				key = (d.name, d.item_code, d.warehouse)
+				key = (d.name, d.item_code, d.warehouse, d.planned_start_date)
 
 			if not item_details["project"] and d.sales_order:
 				item_details["project"] = frappe.get_cached_value("Sales Order", d.sales_order, "project")
 
 			if self.get_items_from == "Material Request":
 				item_details.update({"qty": d.planned_qty})
-				item_dict[(d.item_code, d.material_request_item, d.warehouse)] = item_details
+				item_dict[
+					(d.item_code, d.material_request_item, d.warehouse, d.planned_start_date)
+				] = item_details
 			else:
 				item_details.update(
 					{
diff --git a/erpnext/manufacturing/doctype/production_plan/test_production_plan.py b/erpnext/manufacturing/doctype/production_plan/test_production_plan.py
index b4b0468a0dd..25fc4f26247 100644
--- a/erpnext/manufacturing/doctype/production_plan/test_production_plan.py
+++ b/erpnext/manufacturing/doctype/production_plan/test_production_plan.py
@@ -867,7 +867,7 @@ class TestProductionPlan(FrappeTestCase):
 			items_data = pln.get_production_items()
 
 			# Update qty
-			items_data[(pln.po_items[0].name, item, None)]["qty"] = qty
+			items_data[(pln.po_items[0].name, item, None, pln.po_items[0].planned_start_date)]["qty"] = qty
 
 			# Create and Submit Work Order for each item in items_data
 			for _key, item in items_data.items():