I inserted a new tab on Party with a field of type *Selection*, and I would like to populate it with the value "blank" that will be the default. So, when I save the Party will not be required to fill this field.
What is the right way to do it? Because, when I try to save the Party and this field is required even if I do 'required=False'. Tryton gives me this message:<https://lh5.googleusercontent.com/-0dvFgQ17H2I/UgkoB0coMwI/AAAAAAAAAw4/-bcJ5rZZhZk/s1600/selection_field.png> <https://lh5.googleusercontent.com/-0dvFgQ17H2I/UgkoB0coMwI/AAAAAAAAAw4/-bcJ5rZZhZk/s1600/selection_field.png>
