API 2.0 - Update Epics using PUT doesn't allow set Owners member of parent Portfolio Team

Issue Summary

The endpoint Epics doesn't allow set Owners members of parent Portfolio Team, but the UI does, which is expected. The following error message shows:

API: /rest/align/api/2/Epics/<id> [PUT]

Cannot update epic with id 9999. Value for ownerId is invalid.

Steps to Reproduce

1. Create an Epic
2. Create a User
3. Make the user member of Epic's parent Portfolio
4. Using the API 2.0 update the Epic's Owner with the user
5. The error message will show

Expected Results

API saves the Owner member of Epic's parent Portfolio

Actual Results

API doesn't save the data.

Workaround

If possible, add the user as:

• member of an agile team which is under a program team;
• direct member of a program/team