Problem: The client is experiencing a persistent warning in the WordPress admin indicating that the 'product_type' field was set incorrectly for some product translations. This issue persists despite following standard troubleshooting procedures, including using the fix button on the WooCommerce Multilingual & Multicurrency troubleshooting page, confirming taxonomy settings, clearing caches, running WPML troubleshooting tools, and conducting a plugin conflict test. Solution: We recommend trying the workaround provided in this support forum thread. If the warning continues, we suggest providing temporary access (WP-Admin and FTP Login info) to your site, preferably a staging site, so we can further investigate and debug the issue. Before proceeding, please ensure you back up your database and website. We will need your permission to deactivate and reactivate plugins and the theme, and to change configurations on your site.
Please note that this solution might be outdated or not applicable to your specific case. We highly recommend checking related known issues at https://wpml.org/known-issues/, verifying the version of the permanent fix, and confirming that you have installed the latest versions of themes and plugins. If the issue persists, please open a new support ticket.