[Resolved] WPML All Import : Undefined array key

Background of the issue:
Hi support, since the last update, two errors are shown in the admin:

Warning: Undefined array key "unique_key" in /home/clients/80943a026384365205cc8ac5872db8e1/sites/nijkerk-ne.com/wp-content/plugins/wpml-all-import/wpml-all-import.php on line 523.

Warning: Undefined array key "custom_type" in /home/clients/80943a026384365205cc8ac5872db8e1/sites/nijkerk-ne.com/wp-content/plugins/wp-all-import-pro/src/Reviews/ReviewLogic.php on line 178

Some error details recieved by mail:

Error Details
=============
An error of type E_ERROR was caused in line 151 of the file .../wp-content/plugins/wp-all-import-pro/models/model/record.php. Error message: Uncaught Exception: Undefined field 'name' requested by: [ process in .../wp-content/plugins/wp-all-import-pro/wp-all-import-pro.php line 839 ] in .../wp-content/plugins/wp-all-import-pro/models/model/record.php:151

Stack trace:
#0 .../wp-content/plugins/wp-all-import-pro/controllers/admin/import.php(2561): PMXI_Model_Record->__get('name')
#1 .../wp-content/plugins/wp-all-import-pro/wp-all-import-pro.php(839): PMXI_Admin_Import->process()
#2 .../wp-includes/class-wp-hook.php(324): PMXI_Plugin->adminDispatcher('')
#3 .../wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters('', Array)
#4 .../wp-includes/plugin.php(517): WP_Hook->do_action(Array)
#5 .../wp-admin/admin.php(259): do_action('all-import_page...')
#6 {main}
thrown

Here's some configuration details.
WordPress 8.1.29 (latest) (no multisite) WooCommerce 9.1.4 (latest) WooCommerce Multilingual & Multicurrency 5.3.6 (latest) WP All Import - ACF Add-on 3.3.8 (latest) WP All Import Pro 4.8.10 (latest) WPML All Import 2.3.0 (latest) WPML Multilingual CMS 4.6.12 (latest) WPML String Translation 3.2.14 (latest) PHP 8.1.29

Symptoms:
Warning: Undefined array key "unique_key" in /home/clients/80943a026384365205cc8ac5872db8e1/sites/nijkerk-ne.com/wp-content/plugins/wpml-all-import/wpml-all-import.php on line 523

Questions:
What is causing these errors?
How can I resolve these errorsi the WPML All Import plugin?