Once you commit the changes made in Portfolio Plan into JIRA, each story is assigned a sprint.
To my understanding this prevents Portfolio from moving these stories in its next plan simulation (sandbox). so we are left with a fixed plan that only way to re-plan it is by moving back all stories from Sprints to Backlog.
How should you use Portfolio to re-simulate after the first Plan commit?
Note: we are working with the non-improved interface.