Migrate POS orders from Actuality Extensions

functions.php

<?php 

function wcpos_update_created_via_field() {
	$batch_size = 100;
	$page       = 1;

	do {
		$orders = wc_get_orders( [
			'limit'   => $batch_size,
			'page'    => $page,
			'type'    => 'shop_order',
			'status'  => 'any',
			'orderby' => 'ID',
			'order'   => 'ASC',
			'return'  => 'objects',
		] );

		foreach ( $orders as $order ) {
			if ( $order->get_created_via() === 'pos' ) {
				$order->set_created_via( 'woocommerce-pos' );
				$order->save();
			}
		}

		$page++;
	} while ( count( $orders ) === $batch_size );
}

wcpos_update_created_via_field();