No mandatory default value for dropdown list parameters in BOMs

For BOM parameters of the type 'Dropdown List' and 'Dropdown List Pair', it is now possible to not set a default value, even when the parameter is marked as mandatory. When using the item in a sales quote or sales order, you must then consciously make a choice. If a mandatory parameter does not yet have a valid value, this will be indicated via a process notification and further processing, such as calculating or forwarding to production, will be blocked until a valid value is entered. Once a value is assigned, it can no longer be cleared.