Description

   The REJECT GENERATION command changes the review status of
   each specified element generation from "pending" to "rejected"
   and removes it from the review pending list. You can use this
   command only on element generations that have reviews pending
   (see the description of the REVIEW GENERATION command for more
   information).

   If you attempt to reserve a generation that has been rejected,
   CMS issues a message stating that the generation was rejected,
   and then prompts you for confirmation. Additionally, further
   generations created from a rejected generation are marked for
   review, regardless of the element's review attribute.