Enrolment

We created a new data source for our external database enrollment plugin that contains the same data as the prior data source, including the user role assignments as "student" or "editingteacher", and when I changed the "Database host" setting for the plugin, saved, and re-sync'd, all the users were set to "no role" and "suspended" in the existing, current courses. I verified that the local and remote field names were correctly set and mapped. Any ideas why this would happen or how to fix it in batch? Thanks.