List of steps to reproduce (step by step, including full links if applicable):
- Visit a task.
- Click "Edit Related Tasks"->"Edit Parent Tasks"
- Select a parent task and click "Save Parent Tasks"
A dialog appears with title "Invalid Relationship" and message "You cannot add more than 0 objects to the relationship."
What should have happened instead?:
The parent tasks list should be updated successfully.
looks like a custom hack of ours broken by some upstream change: https://github.com/wikimedia/phabricator/commit/4f4cae8e183d76bc758b5aaa5c966d5a607e027a