"Start migration to 6.0 [SKIP CI]."

shipment.py

@@ -29,8 +29,8 @@ class ShipmentWebLinkMixin(object):
         'get_encrypted_url')
     encrypted_id = fields.Function(fields.Char('Encrypted id'),
         'get_encrypted_id')
-    attachments = fields.Function(fields.One2Many('ir.attachment',
-        None, 'Attachments'), 'get_attachments')
+    attachments = fields.Function(fields.Many2Many('ir.attachment',
+        None, None, 'Attachments'), 'get_attachments')
 
     @classmethod
     def __setup__(cls):
@@ -44,7 +44,7 @@ class ShipmentWebLinkMixin(object):
         })
         cls.state.selection.extend([('mail_sent', 'Mail sent')])
         cls._buttons['draft']['invisible'] = ~Eval('state').in_(
-            ['waiting', 'cancel', 'mail_sent'])
+            ['waiting', 'cancelled', 'mail_sent'])
 
     @classmethod
     def get_custom_title(self, report_name, record, title):

tryton.cfg

@@ -1,5 +1,5 @@
 [tryton]
-version=5.0.0
+version=6.0.0
 depends:
     ir
     res