diff --git a/jikimo_purchase_request/wizard/purchase_request_line_make_purchase_order.py b/jikimo_purchase_request/wizard/purchase_request_line_make_purchase_order.py
index c1b79724..9317ac33 100644
--- a/jikimo_purchase_request/wizard/purchase_request_line_make_purchase_order.py
+++ b/jikimo_purchase_request/wizard/purchase_request_line_make_purchase_order.py
@@ -123,6 +123,7 @@ class PurchaseRequestLineMakePurchaseOrderItem(models.TransientModel):
     wiz_id = fields.Many2one(
         comodel_name="purchase.request.line.make.purchase.order",
         string="Wizard",
+        required=False,
         ondelete="cascade",
         readonly=True,
     )