diff --git a/sf_manufacturing/models/mrp_workorder.py b/sf_manufacturing/models/mrp_workorder.py
index 37b87906..d50b1df2 100644
--- a/sf_manufacturing/models/mrp_workorder.py
+++ b/sf_manufacturing/models/mrp_workorder.py
@@ -1128,7 +1128,7 @@ class ResMrpWorkOrder(models.Model):
                         if (
                                 line.product_id.server_product_process_parameters_id == workorder.surface_technics_parameters_id
                                 and line.product_qty == len(production_no_remanufacture)):
-                            if purchase_orders.state == 'purchase':
+                            if all(pur_order.state == 'purchase' for pur_order in purchase_orders):
                                 workorder.state = 'ready'
                             else:
                                 workorder.state = 'waiting'