diff --git a/purchase_customer_requisition/models/purchase_order_line.py b/purchase_customer_requisition/models/purchase_order_line.py
index b431e73..cf36bc3 100644
--- a/purchase_customer_requisition/models/purchase_order_line.py
+++ b/purchase_customer_requisition/models/purchase_order_line.py
@@ -21,7 +21,7 @@ class PurchaseOrderLine(models.Model):
         for line in self:
             customer = line.sale_order_id.partner_id or line.group_id.partner_id
             if not customer:
-                sale_order = line.order_id._get_sale_orders()
+                sale_order = line.move_dest_ids.group_id.sale_id
                 if len(sale_order) == 1:
                     customer = sale_order.partner_id
             domain = [
diff --git a/purchase_customer_requisition/tests/test_purchase_order.py b/purchase_customer_requisition/tests/test_purchase_order.py
index 4137610..3b38d98 100644
--- a/purchase_customer_requisition/tests/test_purchase_order.py
+++ b/purchase_customer_requisition/tests/test_purchase_order.py
@@ -129,7 +129,7 @@ class TestPurchaseOrder(TransactionCase):
         sale_order_1.action_confirm()
         sale_order_2 = self.env["sale.order"].create(
             {
-                "partner_id": self.client_2.id,
+                "partner_id": self.client_3.id,
                 "order_line": [
                     Command.create(
                         {
@@ -154,5 +154,6 @@ class TestPurchaseOrder(TransactionCase):
             self.agreement_2,
             f"PO line for Partner 2 should have requisition {self.agreement_2.name}, not {purchase_order.order_line[1].requisition_id.name}"
             f"PO line has sale order {purchase_order.order_line[1].sale_order_id} and sale line {purchase_order.order_line[1].sale_line_id}"
-            f"PO has sales orders {purchase_order._get_sale_orders()}",
+            f"PO has sales orders {purchase_order._get_sale_orders()}"
+            f"PO has requisition {purchase_order.requisition_id}",
         )