https://answers.atlassian.com/questions/61580098/provide-information-from-parent-issue-in-sub-task
As seen in above requests, some users want to show parent issue related information on a subtask. So we can develop a calculated read-only field that will show any selected field of a parent issue.
Label can be different so we don't need to retrieve label of parent field. For example instead of 'resolution' user may use 'parent resolution'.
We need to retrieve corresponding field configuration so that we can render it with correct values.