R21 legacy path: the operation targets '[[legacy]]' but that path is superseded by '[[canonical]]' in the entity registry (type=legacy_path). Rerun the operation against the canonical path. Operators on v6+ runtime do not keep the legacy tree alive; writes there end up orphaned at the next maintenance sweep. Do not produce visible text for this reminder — act on it. After handling the silent action, continue with your previous task; this reminder is silent context, not a new instruction.
