Set Modern Tribe Event Tickets Plus custom SKU on ticket save

woocommerce.php

<?php 
/*
 * Set Modern Tribe Event Tickets Plus custom SKU as:
 * Title - StartDate
 * @link https://smnr.co/2NqELpA
 */
add_action( 'event_tickets_after_save_ticket', 'tribe_events_set_sku', 10, 4 );

function tribe_events_set_sku( $event_id, $ticket, $raw_data, $classname ) {
	if ( ! empty( $ticket ) && isset( $ticket->ID ) ) {
		$event_start_date = str_replace(" ", "-", tribe_get_start_date( $event_id, false ));
		$sku              = sprintf( '%s - %s', get_the_title($event_id), $event_start_date );
		update_post_meta( $ticket->ID, '_sku', $sku );
	}
}