Attendance does not allow "No show"

[codyjanderson]

In Moodle 3.1.5, the attendance feature of the Face-to-face plugin cannot mark users as "No show". When clicking on "Take attendance", I try to change any user to "No show" and click save, it will then revert back to the previous state once the page reloads. Fully attended and Partially attended options save without any issue.