Duplicate element ID

Two elements share an id (or two IDs hash to the same identity), or an expanded component produced no root.

#Common causes

• A list repeats an ID prefix without a per-item key.
• A component template is empty.

#Fixes

• Include the item key in generated IDs.

• Give every component exactly one root element.

• Code: ARA4005

• Constant: ui::DUPLICATE_ID

• Reported by: ara-ui-document