Magento 2.4.6 Deprecated Functionality: Creation of dynamic property

I try to solve this error:

main.CRITICAL: Deprecated Functionality: Creation of dynamic property VENDORMODULEModelRedsysFactory::$helper is deprecated in /var/www/vhosts/xxxxxx.com/httpdocs/app/code/VENDOR/MODULE/Model/FILE.php on line 71 [] []
main.ERROR: Please provide payment for the order. [] []

LINE 71 SAID:
$this->helper = $helper;

I try to use this code:

    /**
 * Use the fully-qualified AllowDynamicProperties, otherwise the #[AllowDynamicProperties] attribute on "MyClass" WILL NOT WORK.
 */
use AllowDynamicProperties;

#[AllowDynamicProperties]
class MyClass
{

but don´t work

Any idea