#18 Cannot delete users via dev site

[Mitchell Erickson]

In attempting to delete one of my "dummy" users, I could not do it. We should have a functionality to delete users. I get this error message:
user warning: Cannot delete or update a parent row: a foreign key constraint fails (`555842_vtdev/vt_appointment`, CONSTRAINT `vt_appointment_ibfk_2` FOREIGN KEY (`tutee_id`) REFERENCES `drupal_users` (`uid`)) query: DELETE FROM drupal_users WHERE uid = 14 in /mnt/stor7-wc2-dfw1/536816/555842/dev.voluntutor.tk/web/content/modules/user/user.module on line 1646.