A user may try to “Pick up” (import) a student's records from another SpEd Forms server and get a warning about the student's ID number already being in the system. This can happen when a student transfers away from your district, then returns at a later date. There are several ways to handle the situation:
Don't import the record. In many cases, the records haven't actually changed so the student only needs to be re-activated.
You could update the middle zeros to old in the ID number to keep things clear.