When I try to insert a database entry in the term_relationships table as soon as a product is saved, I cannot use the product ID. When I use any other number, I can insert an entry but as soon as I try to use the product ID of the product created, nothing is inserterted. Am i doing something wrong or why can’t i insert a new relationship?

<?php
add_action('woocommerce_new_product', 'sync_on_product_save', 10, 1);
add_action('woocommerce_update_product', 'sync_on_product_save', 10, 1);
function sync_on_product_save($product_id)
{
    global $wpdb;
    global $current_user;
    global $product;
    get_currentuserinfo();

    $product = wc_get_product($product_id);
    $product_id = $product->get_id();
    $int = (int)filter_var($product_id, FILTER_SANITIZE_NUMBER_INT);

    $user_id = $current_user->ID;
    $term = $wpdb->get_row($wpdb->prepare("SELECT * FROM $wpdb->termmeta WHERE user_id = %d", $user_id));
    $term_id = $term->term_id;
    $term_tax = $wpdb->get_row($wpdb->prepare("SELECT * FROM $wpdb->term_taxonomy WHERE term_id = %d", $term_id));
    $term_tax_id = $term_tax->term_taxonomy_id;

    $termmeta = $wpdb->prefix . 'term_relationships';
    $wpdb->insert($termmeta, array(
        "object_id" => $int,
        "term_taxonomy_id" => $term_tax_id,
        "term_order" => '0'
    ));
}
?>