Face-to-face (plugin)

Hello everyone. I have one course with multiple sessions. If a student cancels out of one session they are unable to enrol into another session as f2f plugin still recognises them as a student. Deleteing the student will do the job but we wish to maintain the information that the student has enrolled and unenrolled for auditing purposes, Is there a way around this to keep the information but tell f2f that the student has cancelled the session and needs to enrol into another? Moodle 2.3.2 Any help is appreciated Thanks Peter