diff --git a/erpnext/buying/doctype/purchase_order/purchase_order.py b/erpnext/buying/doctype/purchase_order/purchase_order.py
index be27000db2b..0a28177ba74 100644
--- a/erpnext/buying/doctype/purchase_order/purchase_order.py
+++ b/erpnext/buying/doctype/purchase_order/purchase_order.py
@@ -259,6 +259,7 @@ class PurchaseOrder(BuyingController):
 					"ref_dn_field": "material_request_item",
 					"compare_fields": mri_compare_fields,
 					"is_child_table": True,
+					"allow_duplicate_prev_row_id": True,
 				},
 			}
 		)