update 7.6

sale.py

@@ -69,13 +69,15 @@ class Sale(metaclass=PoolMeta):
         to_post = set()
         for sale in sales:
             grouping = getattr(sale.party, 'sale_invoice_grouping_method',
-                               False)
+                False)
+            if Transaction().context.get('skip_grouping', False):
+                grouping = None
             if getattr(sale, 'invoices', None) and not grouping:
                 for invoice in sale.invoices:
                     if not invoice.state == 'draft':
                         continue
                     sale.set_basic_values_to_invoice(invoice)
-                    invoices.extend(([invoice], invoice._save_values))
+                    invoices.extend(([invoice], invoice._save_values()))
                     to_post.add(invoice)
 
         if to_post: