-`nl_order_id` BIGINT(20) NOT NULL AUTO_INCREMENT,
-`nl_sponsor_id` BIGINT(20) NOT NULL DEFAULT 0,
-`nl_id` BIGINT(20) NOT NULL DEFAULT 0,
-`nl_topic_id` BIGINT(20) NOT NULL DEFAULT 0,
+`nl_order_id` BIGINT(20) UNSIGNED NOT NULL AUTO_INCREMENT,
+`nl_sponsor_id` BIGINT(20) UNSIGNED NOT NULL DEFAULT 0,
+`nl_id` BIGINT(20) UNSIGNED NOT NULL DEFAULT 0,
+`nl_topic_id` BIGINT(20) UNSIGNED NOT NULL DEFAULT 0,