diff --git a/sf_manufacturing/models/stock.py b/sf_manufacturing/models/stock.py
index 46ac6f32..3ecb80be 100644
--- a/sf_manufacturing/models/stock.py
+++ b/sf_manufacturing/models/stock.py
@@ -596,18 +596,18 @@ class StockPicking(models.Model):
                     for move_id in item.move_ids:
                         move_ids.append(move_id.product_id.id)
                     boms = self.env['mrp.bom'].sudo().search([('bom_line_ids.product_id', 'in', move_ids)])
-                    default_codes = ''
                     if boms:
+                        codes_list = []
                         for bom in boms:
                             if bom.product_tmpl_id.default_code:
-                                code = bom.product_tmpl_id.default_code.split('-')[-1]
-                                default_code = bom.product_tmpl_id.default_code.split(f'-{code}')[0]
-                                if default_code not in default_codes:
-                                    if default_codes == '':
-                                        default_codes = default_code
-                                    else:
-                                        default_codes = default_codes + ',' + default_code
-                    item.retrospect_ref = default_codes
+                                code_list = bom.product_tmpl_id.default_code.split('-')
+                                if len(code_list) >= 4:
+                                    code = '-'.join(code_list[:4])
+                                    if code not in codes_list:
+                                        codes_list.append(code)
+                                else:
+                                    raise ValidationError('坯料成品的内部参考值格式错误')
+                        item.retrospect_ref = ','.join(codes_list)
                 elif item.picking_type_id.sequence_code in ['INT', 'PC']:
                     pass