diff --git a/erpnext/accounts/doctype/sales_invoice/sales_invoice.py b/erpnext/accounts/doctype/sales_invoice/sales_invoice.py
index 434662c298b..3d18a860361 100644
--- a/erpnext/accounts/doctype/sales_invoice/sales_invoice.py
+++ b/erpnext/accounts/doctype/sales_invoice/sales_invoice.py
@@ -2195,9 +2195,18 @@ def make_inter_company_transaction(doctype, source_name, target_doc=None):
 
 
 def get_received_items(reference_name, doctype, reference_fieldname):
+	reference_field = "inter_company_invoice_reference"
+	if doctype == "Purchase Order":
+		reference_field = "inter_company_order_reference"
+
+	filters = {
+		reference_field: reference_name,
+		"docstatus": 1,
+	}
+
 	target_doctypes = frappe.get_all(
 		doctype,
-		filters={"inter_company_invoice_reference": reference_name, "docstatus": 1},
+		filters=filters,
 		as_list=True,
 	)
 
diff --git a/erpnext/controllers/buying_controller.py b/erpnext/controllers/buying_controller.py
index 81736915f55..8e9b2289079 100644
--- a/erpnext/controllers/buying_controller.py
+++ b/erpnext/controllers/buying_controller.py
@@ -354,7 +354,11 @@ class BuyingController(SubcontractingController):
 
 					rate = flt(outgoing_rate * (d.conversion_factor or 1), d.precision("rate"))
 				else:
-					field = "incoming_rate" if self.get("is_internal_supplier") else "rate"
+					field = (
+						"incoming_rate"
+						if self.get("is_internal_supplier") and not self.doctype == "Purchase Order"
+						else "rate"
+					)
 					rate = flt(
 						frappe.db.get_value(ref_doctype, d.get(frappe.scrub(ref_doctype)), field)
 						* (d.conversion_factor or 1),