In a form I have two types of records: initial and follow-up.

I would like to use ID field for records identification and that is perfect for initial records: they are large, unique and randomly generated numbers.

My problem ist this: a follow-up record must have the same identification number like the initial record.

How can I solve this kind of problem? Maybe I can use ID field and than import the number in another kind of field (formula, etc), using a combination between MaxValueHolder and an ID field or something like that and complete that field with initial record identification number. But formula field can't be edited... Do you have any ideea?

Thank you!