Modules with Validation Errors

The module is in an expired product group.
The product group the module is in has expired or is invalid and must be changed to an active NOBB product group.
How to change the product group on the module: Change the product group on the module
The module does not have a valid ETIM class.
The ETIM class is missing or invalid for the selected NOBB product group.
Read more here: New ETIM class due to changed product group.