// Add this code in your theme's functions.php file or in a custom plugin
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​
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function update_all_ai_tools_posts_highlight_product_meta() {
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    // Get all posts of the "ai-tools" post type
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    $args = array(
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        'post_type' => 'ai-tools',
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        'posts_per_page' => -1, // Retrieve all posts
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    );
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​
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    $ai_tools_posts = new WP_Query($args);
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​
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    if ($ai_tools_posts->have_posts()) {
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        while ($ai_tools_posts->have_posts()) {
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            $ai_tools_posts->the_post();
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​
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            // Update the "highlight-product" meta field to "none"
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            update_post_meta(get_the_ID(), 'highlight-product', 'none');
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        }
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​
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        // Reset post data
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        wp_reset_postdata();