I want to create a automation rule to copy value from one system field to another custom field

[Anil]

Hi Team,

I want to create a automation rule to copy value from labels(system field) to another custom field.

Best Regards,

Anil Kumar

[Mikael Sandberg]

This is pretty simple to do with smart values, in it's simplest form the automation would look something like this:

I would recommend that you take a look at Smart values in Jira automation, it has examples of what smart values you can use and there are also example of how to use them.

[Bill Sheboy]

Hi @Anil 

Adding to Mikael's answer: you appear to be using Jira Server version, and so here are the automation references for that version:

https://confluence.atlassian.com/automation/smart-values-993924860.html
https://confluence.atlassian.com/automation/examples-of-using-smart-values-with-lists-993924631.html

Kind regards,
Bill