How can a child product cease to have a parent product? How is the relationship between parent product and child product severed?

A child product ceases to be a child of the parent product when one of the following conditions is met:

• On the parent product side: Change the product format to a format other than the parent product (all child products are subject to being released).
• On the child product side: Change the product format to something other than the child product.
• The seller of the parent product sends a release request from the Contact Us page with information about the child product.

Please also check "What happens to the child product when the parent product becomes private?" as well.