diff --git a/sf_sale/models/sale_order.py b/sf_sale/models/sale_order.py
index 2e99de70..aa8d36b8 100644
--- a/sf_sale/models/sale_order.py
+++ b/sf_sale/models/sale_order.py
@@ -370,11 +370,12 @@ class RePurchaseOrder(models.Model):
                             move_id.put_move_line()
             for line in item.order_line:
                 if line.product_id.categ_type == '表面工艺':
-                    for production_name in item.origin.split(','):
-                        production = self.env['mrp.production'].search([('name', '=', production_name)])
-                        for workorder in production.workorder_ids.filtered(
-                                lambda wd: wd.routing_type == '表面工艺' and wd.state == 'waiting' and line.product_id.server_product_process_parameters_id == wd.surface_technics_parameters_id):
-                            workorder.state = 'ready'
+                    if item.origin:
+                        for production_name in item.origin.split(','):
+                            production = self.env['mrp.production'].search([('name', '=', production_name)])
+                            for workorder in production.workorder_ids.filtered(
+                                    lambda wd: wd.routing_type == '表面工艺' and wd.state == 'waiting' and line.product_id.server_product_process_parameters_id == wd.surface_technics_parameters_id):
+                                workorder.state = 'ready'
 
         return result