A new feature is being implemented to allow the reporting of products that have never been on the market. The list of reasons for cessation will be updated to add a new one 'Never marketed' and in this case, the date of marketing status change won't be mandatory. Until this feature is implemented, please do not report these presentations, leave them as No data provided. Otherwise you'll be receiving validation errors. We expect the new feature to be in production within a couple of weeks.