How to update Record Model for old Records(Personnel Record) in DPF?

Hi

i was able to successfully implement Digital Personnel files and Record Management for my scenario, but now question is:

i have created a record for personnel using "SE38--> Report (RPASRCREATEDPF)"  or "Tx RPASRCREATEDPF)  after a while i decided to add a node to my record model , how can i update my personnel records to new record model?

i need to do it for several staff and this is not logical to change record for every individual staff. Also when i deleted a record and recreated it all of old Archived and Processed Document gone.

Any Idea?

Regards,

Ali.