Copy fix version from parent to sub task while creating sub task using script runner

[Tukaram Bhukya]

Please can some one help me to write script runner script to " Copy fix version from parent to sub task while creating sub task ".

[Francisco Muro]

fix version is a system field, not a custom field. This works for me

// inherit system fields
UpdateIssueRequest updIssReq;
UpdateIssueRequest.UpdateIssueRequestBuilder issueRequestBuilder = new UpdateIssueRequest.UpdateIssueRequestBuilder();
issueRequestBuilder.eventDispatchOption(EventDispatchOption.ISSUE_UPDATED);
issueRequestBuilder.sendMail(false);
updIssReq = new UpdateIssueRequest(issueRequestBuilder);

MutableIssue _subTask = issue as MutableIssue

def fixVersionsField = parentIssue.getFixVersions();
// add system fields to inherit before calling issueManager.updateIssue()
_subTask.setFixVersions(fixVersionsField);
issueManager.updateIssue(curUser, _subTask, updIssReq);

[Tukaram Bhukya]

below script copies story points from parents to sub task while creating sub task but still i'm not able copy fix version like story points.

could some one help me to modify this script to copy fix version as well

import com.atlassian.jira.component.ComponentAccessor
import com.atlassian.jira.issue.CustomFieldManager
import com.atlassian.jira.issue.IssueManager
import com.atlassian.jira.issue.Issue
import com.atlassian.jira.issue.MutableIssue
import com.atlassian.jira.issue.util.DefaultIssueChangeHolder
import com.atlassian.jira.issue.ModifiedValue

def field = ComponentAccessor.getCustomFieldManager().getCustomFieldObjectByName("Story Points")

//def field = ComponentAccessor.getCustomFieldManager().getCustomFieldObjectByName("fixVersion")

def parentMyFieldValue = issue.parentObject.getCustomFieldValue(field)
def changeHolder = new DefaultIssueChangeHolder();
field.updateValue(null, issue, new ModifiedValue(issue.getCustomFieldValue(field), parentMyFieldValue),changeHolder);