EPM Planning – Copying Cell Attachments and User Information

I need to copy cell attachments from one scenario to another. I have used the 'Copy Data' utility in EPM Planning and it successfully copies:
Copy Supporting Details
Copy Comments
Copy Attachments

However, I've noticed that the original user who uploaded the attachment is replaced with "Unknown User" after the copy process.

Has anyone successfully copied cell attachments while preserving (or carrying over) the original uploaded-by user information? If so, could you please share the approach that made this possible?

Any guidance or suggestions would be greatly appreciated.