Error en configuración de sale_devices

[luisdeiana]

Al instalar sale_pos_ar branch feature-rework-implement-sale-pos-zikzakmedia y abrir la configuracion de sale_devices da el siguiente error:

Traceback (most recent call last):
File "/trytond/wsgi.py", line 47, in dispatch_request
return endpoint(request, **request.view_args)
File "/trytond/protocols/dispatcher.py", line 59, in rpc
request, database_name, *request.params)
File "/trytond/wsgi.py", line 39, in auth_required
return wrapped(*args, **kwargs)
File "/trytond/protocols/dispatcher.py", line 40, in wrapper
return func(request, pool, *args, **kwargs)
File "/trytond/protocols/dispatcher.py", line 204, in _dispatch
result = rpc.result(meth(*c_args, **c_kwargs))
File "/trytond/model/modelview.py", line 345, in fields_view_get
result['field_childs'])
File "/trytond/model/modelview.py", line 452, in _view_look_dom_arch
fields_width=fields_width)
File "/trytond/model/modelview.py", line 602, in __view_look_dom
fields_width=fields_width, fields_attrs=fields_attrs)
File "/trytond/model/modelview.py", line 543, in __view_look_dom
field = cls._fields[fname]
KeyError: 'pos_ar'