Merge Contacts - CreatedOn field is not shown on the Merge view

Hi all,

I´m using CRM 2016 Spring versión and I´m trying to merge 2 contacts using Merge tool. I can see most of the fields on the form except for "CreatedOn" field. I know this is a special system field but I have even tried to create a new calculated field with the same information. I have both fields on the form, but still cannot see any of them in the merge view.

Any idea on how to get that field showing up in Merge view?

Regards,

Javier.