Add custom field into naming series ERP 7.1.0

Hi, ERPNext gurus!
Please help me to understand how to set up a naming series in ERP 7.1.0
I am not sure if it’s possible in this old version to set the custom field “item_name” to be used in the naming series…

Hope to hear any advice on that

This is a very old version. you have to upgrade your version to 12 or above. there is a lot of new functionality available.