Change Lead/Contact created date and user who created it

Change Lead/Contact created date and user who created it

Hi

We have one person updating our customers database, importing prospects and clients.

We would like to change the Created Date in Zoho to the date of the actual first contact we had with our Lead/Customer, ranging from weeks, months and even years ago.

Also, we would like to change not only the OWNER of the contacts we wold like to change the CREATOR of them to reflect the actual OWNER.

I tried doing so from Zoho Sheet as an administrator but these changes did not applied