At workitem creation time is there a way to check if the workitem has a parent
One answer
It's actually a popular topic on this forum and it's not hard to find similar discussions.
https://jazz.net/forum/questions/224732/mandatory-to-link-work-item
https://jazz.net/forum/questions/216569/mandatory-duplicate-work-item-link-if-duplicate-resolution-is-selected
https://jazz.net/forum/questions/213375/how-to-set-links-as-mandatory-before-saving-a-workitem