When the event is no longer valid, it can be finalized. For finalizing event all markets have to be resolved. It means that bet states of markets should be winner/loser or cancelled. Steps for finalizing event:

• Check if all markets of event are resolved, if not - resolve;
• Click on X button near 'Event Change Log' button;
• In opened modal 'Finalize event' confirm finalizing by clicking 'Finalize Prematch Event' button.

If event has the replicated event, both events must be resolved in order to finalize it.