Parent Issue Field custom field brings the specified field/customfield of parent issue to subtask.
To create a Parent Issue Field custom field
- Navigate to JIRA Admin > Add-ons > Enhancer Plugin Menu > Custom Field Configuration and switch to Parent fields tab.
- Click on button
- Fill the dialog
- Name the field
- Select the field/custom field
- Click Add Custom Field button
- You can define as many Parent Issue Field as you want.