diff --git a/sale.py b/sale.py
index 6c5efd2..ee8c180 100644
--- a/sale.py
+++ b/sale.py
@@ -38,9 +38,9 @@ class Sale(metaclass=PoolMeta):
             return res
         else:
             records = cls.browse([args['id']])
-            lines_tuple = args.get('lines')
-            if lines_tuple:
-                action, lines = lines_tuple
+            lines_action = args.get('lines')
+            for action, lines in lines_action:
+                # action, lines = lines_tuple
                 if action == 'create' and len(lines) > 0:
                     for line in lines:
                         product = Product(line['product'])
diff --git a/tryton.cfg b/tryton.cfg
index 08f84b2..b167367 100644
--- a/tryton.cfg
+++ b/tryton.cfg
@@ -1,5 +1,5 @@
 [tryton]
-version=6.0.17
+version=6.0.18
 depends:
     party
     product