diff --git a/sf_manufacturing/models/purchase_order.py b/sf_manufacturing/models/purchase_order.py
index e15c25e6..ee2e4e54 100644
--- a/sf_manufacturing/models/purchase_order.py
+++ b/sf_manufacturing/models/purchase_order.py
@@ -109,9 +109,9 @@ class PurchaseOrder(models.Model):
 class PurchaseOrderLine(models.Model):
     _inherit = 'purchase.order.line'
 
-    part_number = fields.Char('零件图号',  store=True, compute='_compute_origin_sale_id')
+    part_number = fields.Char('零件图号',  store=True, compute='_compute_related_product')
     part_name = fields.Char('零件图号', store=True,
-                              compute='_compute_origin_sale_id')
+                              compute='_compute_related_product')
     related_product = fields.Many2one('product.product', string='关联产品',
                                       help='经此产品工艺加工成的成品')
     @api.depends('product_id')