Must designer keep a not published custom order

For years I always wondered if I can delete the unpublished product which was a custom design for a buying customer,
I am assuming they will order again. Will it not be available to them anymore?

@Mistica  They will be able to purchase it again through their orders if they so wish. When you say unpublished - do you mean it’s set as direct only? i.e not in the marketplace

Yes… Direct only.

I might have hidden them after the sale.