I would like to change one label for one of the possible values of contact type field. from 'Delivery address' to i.e. 'Shipping address' while keepeng the 'delivery' value to mantain all the business logic binded to this field. The type field is defined as this, I know how to add a new value, how to delete a value, but not how to change only the label.

type = fields.Selection( 
[('contact', 'Contact'),
('invoice', 'Invoice Address'),
('delivery', 'Delivery Address'),
('other', 'Other Address'),
("private", "Private Address"),
], string='Address Type',
default='contact')