Update Epic API does not support passing in a parent_id option
Proposal
The current Epic API documentation does not list parent_id
or as an option for updating. This means that it is not possible to use the API to change the hierarchy of epics outside of GitLab.parent_iid
Edit: parent_iid
was removed due to a number of issues with its use elsewhere, for example #13808 (comment 233123050)
Edited by Andrew Smith