Updating a variable on legacy vault files

We are looking to update the CreatedDate variable on all of our existing files in our PDM Vault.  I want to update it with the date the file was originally created.  The image below is the window I get when I right click on a file in the vault and select Properties.  I want to use the Created value that I have circled.  Is this possible and how do I do that?

Thank you.