Update Field configuration schema via API

Hi there,

I have two separate jira sites, one for development(dev) and one for produciton(prod) data.

If I made som changes in Fields configuraiton schema and workflows in a dveleopment site, how can I move this configuration over to the production site without interuptions of users in this site?

How to map Custom fields between two sites?
I could use names, but Field’s name is not unique.

Thank you