Can someone help me to pre populate the Acceptance Criteria field using Script Runner?

[Kristen Riddle]

I am trying to create a behavior in Jira to pre populate the acceptance criteria field using script runner. I was able to pre populate description but acceptance criteria script not working. Here is the script I am using:

def desc = getFieldById("acceptance criteria")

def defaultValue = """h2. Given <assumptions>,

     (And <additional assumptions as needed>,)

h2. When <inputs>,

     (And <additional inputs as needed>,)

h2. Then <system response>,

     (And <additional system responses as needed>.)

""".replaceAll(/ /, '')

if (! underlyingIssue?.description) { desc.setFormValue(defaultValue) }