Unfortunately at this time, those fields on the general product will need values inputted into them. Otherwise, you will need to create a new product. I can submit a feature request
on your behalf to make these fields not required.
I apologize for the inconvenience this causes you.
the Telerik team
Do you want to have your say in the Sitefinity development roadmap? Do you want to know when a feature you requested is added or when a bug fixed? Explore the Telerik Public Issue Tracking
system and vote to affect the priority of the items