{"id":"no-window-merging-or-retraction","text":"Once an `AggregationResult` is emitted from `advance_watermark`, there is no mechanism to update or retract it — finalized windows reject all further events.","truth_value":"IN","source":"entries/2026/06/05/ad-click-event-aggregation-click_aggregator.md","source_url":"","source_hash":"","justifications":[],"dependents":["watermark-finalization-is-irreversible"],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"no-window-merging-or-retraction","truth_value":"IN","reason":"premise"}]}}