Set Affect/s Version on linked issue

[Casey Hinkle]

Hello, I am running into issues with attempting to set the Affect/s Version system field on a linked issue with a value from a custom field that is a version field. The issue I am having is that this piece of code gives me an error of Cannot find matching method:

destinationIssue.setAffectedVersion(productVersion)

I have even tried performing the same action on the FixVersions field for a test and the same error in my code. Is there something I am missing here?

Using JIRA DataCenter 8.5