sakura/sidebar.php

<?php
/**
 * The sidebar containing the main widget area.
 *
 * @link https://developer.wordpress.org/themes/basics/template-files/#template-partials
 *
 * @package Akina
 */

//disable get_sidebar()
if ( is_active_sidebar( 'sakura_widget' ) ) {
	return;
}
?>

<aside id="secondary" class="widget-area" role="complementary">
	<?php dynamic_sidebar( 'sidebar-1' ); ?>
</aside><!-- #secondary -->