The 10.7.18 hotfix release addresses a pair of issues with the "cascade delete prompt" in the preside admin, one critical. Before the fix, when deleting records that had one-to-many relationships that *were not required*, the cascade prompt would appear and subsequently delete the related records when you chose to "force" delete. With the fix, the system will not treat optional relationships as blocking deletes, and will not delete the related records either.
[PRESIDECMS-689] - Cascading deletes in admin: forces deletes of records even when relationship is not required
[PRESIDECMS-691] - Cascade deletes in custom pages: cancel/success endpoint is not correct