Variable products allow store owners to sell a single item (like a T-shirt) with multiple options (like Size and Color), each with its own price and stock level. However, a recurring database glitch often causes WooCommerce to display incorrect prices for specific variations, or worse, show a generic "Sorry, no products matched your selection. Please choose a different combination" error on the frontend, even though the variation is fully configured and active in the dashboard.

This bug usually rears its head when a store has products with dozens of variations. When a customer changes dropdown options, WooCommerce uses asynchronous JavaScript to fetch the specific price and data from the database. If your database tables are fragmented, or if the WooCommerce product lookup tables become desynchronized after a bulk import or WPML translation process, the query fails. The frontend gets confused, defaulting to the lowest base price of the parent product, allowing customers to accidentally buy premium variations at a massive discount.

The Solution

To fix the variation data discrepancy, you need to force WooCommerce to rebuild its internal relational data maps and increase the variation processing threshold.

  1. Regenerate Lookup Tables: Navigate to WooCommerce > Status and click on the Tools tab. Locate the entry titled Regenerate product lookup tables and click the "Regenerate" button next to it. This fixes broken links between parent items and child variations.

  2. Clear Product Transients: On that same Tools page, click Clear WooCommerce transients and Clear expired transients. This wipes the temporary memory cache holding old, incorrect pricing data.

  3. Increase the Variation Threshold: If your products have more than 30 variations each, WooCommerce struggles to load them dynamically. Add this custom filter to your theme's functions.php file to increase the AJAX threshold limit to 100:

PHP
 
add_filter('woocommerce_ajax_variation_threshold', 'custom_wc_ajax_variation_threshold', 10, 2);
function custom_wc_ajax_variation_threshold($qty, $product) {
    return 100;
}

  1. Re-save the Product: If only one specific product is bugged, open its edit screen, change the status to Draft, click Update, change it back to Published, and save again to force a hard rewrite.