Course identifier in Rise

Thanks for the follow up Alyssa. It appears that if we upload the edited SCORM file, those who have already completed the course see just a gray screen in place of the course, but their completion remains in tact. Anyone who hadn't completed the course can see and take the course just fine. We didn't change anything about the file name, etc on purpose to maintain completion data, so our best deduction is that the SCORM ID has an impact. This is a Moodle-based system. We're still testing but so far this is the only logical explanation.