Fatal Error in WordPress 6.0.1

Info:
Wordpres Version: 6.0.1
Woocommerce Version: 6.7.0
Germanized Version: 3.9.8

Since the update to WordPress Version 6.0.1 from 5.9, product variations dropdown menu is only displayed on some products.

The responsible shortcode triggering the error is: do_shortcode(‘[product_page id=”‘ . $product . ‘”]’).
This throws an fatal error to be found in the wc-logs folder.

The responsible erroneous function is meta-boxes/class-wc-gzd-meta-box-product-data-variable.php in line 409 from the germanized plugin.

The log entry:

2022-07-24T21:31:57+00:00 CRITICAL Uncaught Error: Call to a member function get_parent_id() on bool in /var/www/html/wp-content/plugins/woocommerce-germanized/includes/admin/meta-boxes/class-wc-gzd-meta-box-product-data-variable.php:409
Stack trace:
#0 /var/www/html/wp-includes/class-wp-hook.php(307): WC_Germanized_Meta_Box_Product_Data_Variable::save(6032, 0)
#1 /var/www/html/wp-includes/class-wp-hook.php(331): WP_Hook->apply_filters('', Array)
#2 /var/www/html/wp-includes/plugin.php(476): WP_Hook->do_action(Array)
#3 /var/www/html/wp-content/plugins/woocommerce/includes/admin/meta-boxes/class-wc-meta-box-product-data.php(563): do_action('woocommerce_sav...', 6032, 0)
#4 /var/www/html/wp-content/plugins/woocommerce/includes/class-wc-ajax.php(2213): WC_Meta_Box_Product_Data::save_variations(6013, Object(WP_Post))
#5 /var/www/html/wp-includes/class-wp-hook.php(307): WC_AJAX::save_variations('')
#6 /var/www/html/wp-includes/class-wp-hook.php(331): WP_Hook->apply_filters('', Array)
#7 /var/www/html/wp-includes/plugin.php(476): WP_Hook->do_action in /var/www/html/wp-content/plugins/woocommerce-germanized/includes/admin/meta-boxes/class-wc-gzd-meta-box-product-data-variable.php in Zeile 409

Will this be solved in the future or is this an error on my side.