我想你可以过滤wp_unique_post_slug 并让它返回帖子的原始slug，但我不确定这可能会有什么副作用：

add_filter( \'wp_unique_post_slug\', function( $slug, $post_id, $post_status, $post_type, $post_parent, $original_slug ) {
    if ( $post_type == \'post\' )
        $slug = $original_slug;

    return $slug;
}, 10, 6 );

add_filter( \'wp_unique_post_slug\', function( $slug, $post_id, $post_status, $post_type, $post_parent, $original_slug ) {
    if ( $post_type == \'post\' && $slug != $original_slug )
        $slug = preg_replace( \'#\\-[0-9]+$#\', \'-\' . $post_id, $slug );

    return $slug;
}, 10, 6 );