public function retro_attendee_page_option( $options ) {
			// Don't migrate option if old option is not set.
			if ( empty( $options['ticket-attendee-info-slug'] ) ) {
				return $options;
			}

			$slug = $options['ticket-attendee-info-slug'];
			unset( $options['ticket-attendee-info-slug'] );

			// ID is already set, just return $options without the slug.
			if ( ! empty( $options['ticket-attendee-info-id'] ) ) {
				return $options;
			}

			$page = get_page_by_path( $slug, OBJECT );

			// Slug does not match any pages or it may have changed, just return $options without the slug.
			if ( empty( $page ) ) {
				return $options;
			}

			// Set ID to the slug page's ID  and return $options without the slug.
			$options['ticket-attendee-info-id'] = $page->ID;

			return $options;
		}