But now we can have two equal records on the unique key

SELECT id, login FROM users WHERE login LIKE 'andy002715724513%';
30684245	"andy002715724513"
30684248	"andy002715724513"

SELECT DISTINCT login FROM users WHERE login LIKE 'andy002715724513%';
"login"
"andy002715724513"

Table haves
  PRIMARY KEY (`id`),
  UNIQUE KEY `login` (`login`)

see full structure below

CREATE TABLE `users` (
  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `login` varchar(100) DEFAULT NULL,
  `pwd` varchar(100) DEFAULT NULL,
  `s_mail` varchar(50) DEFAULT NULL,
  `s_www` varchar(255) DEFAULT NULL,
  `s_inn` varchar(50) DEFAULT NULL,
  `s_descr` text,
  `s_phone` varchar(100) DEFAULT NULL,
  `offert_accepted` tinyint(3) unsigned NOT NULL DEFAULT '0',
  `s_full_name` varchar(255) DEFAULT NULL,
  `s_first_name` varchar(100) DEFAULT NULL,
  `s_middle_name` varchar(100) DEFAULT NULL,
  `s_last_name` varchar(100) DEFAULT NULL,
  `s_city` varchar(100) DEFAULT NULL,
  `s_address` varchar(255) DEFAULT NULL,
  `last_used` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
  `last_host_id` smallint(5) unsigned DEFAULT NULL,
  `mail_confirmed` tinyint(1) unsigned NOT NULL DEFAULT '0',
  `msisdn_confirmed` tinyint(1) unsigned NOT NULL DEFAULT '0',
  `msisdn_confirm_code` varchar(4) DEFAULT NULL,
  `msisdn_req_time` datetime DEFAULT NULL,
  `java_phone_model` varchar(30) DEFAULT NULL,
  `java_font` varchar(30) DEFAULT NULL,
  `java_safe_mode` tinyint(4) NOT NULL DEFAULT '0',
  `user_pic` varchar(16) DEFAULT NULL,
  `denied_libs` varchar(255) DEFAULT NULL,
  `recenser_type` int(11) DEFAULT NULL,
  `partner_id` int(11) DEFAULT NULL,
  `creat_date` datetime DEFAULT NULL,
  `partner` int(10) unsigned DEFAULT NULL,
  `partner_valid_till` date DEFAULT NULL,
  `partner_pin` varchar(32) DEFAULT NULL,
  `account` decimal(9,2) NOT NULL DEFAULT '0.00',
  `abonement_start` datetime DEFAULT NULL,
  `abonement_expires` date NOT NULL DEFAULT '2006-01-01',
  `abonement_period` smallint(6) DEFAULT NULL,
  `abonement_delay` tinyint(3) unsigned NOT NULL DEFAULT '0',
  `abonement_max_price` decimal(6,2) DEFAULT NULL,
  `abonement_downloads` tinyint(3) unsigned NOT NULL DEFAULT '0',
  `abonement_left_clicks` tinyint(3) unsigned NOT NULL DEFAULT '0',
  `abonement_left_summ` decimal(6,2) DEFAULT NULL,
  `user_pic_height` tinyint(3) unsigned DEFAULT NULL,
  `user_pic_width` tinyint(3) unsigned DEFAULT NULL,
  `show_pay_btn` tinyint(3) unsigned NOT NULL DEFAULT '0',
  `s_puid` varchar(255) DEFAULT NULL,
  `discount` decimal(4,4) NOT NULL DEFAULT '0.0000',
  `money_bonus` decimal(9,2) NOT NULL DEFAULT '0.00',
  `subscr_last_reminded` datetime DEFAULT NULL,
  `subscr_free_arts_given` datetime DEFAULT NULL,
  `subscr_type` tinyint(3) unsigned NOT NULL DEFAULT '2',
  `subscr_period` tinyint(3) unsigned DEFAULT '1',
  `subscr_content` tinyint(3) unsigned DEFAULT '2',
  `subscr_genres` text,
  `s_subscr_text_authors` text,
  `subscr_date` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00',
  `s_subscr_text_pattern` text,
  `subscr_languages` text,
  `prefered_currency` char(3) DEFAULT NULL,
  `last_paymethod` tinyint(3) unsigned DEFAULT NULL,
  `utc_offset` char(6) DEFAULT NULL,
  `last_ip` varchar(15) DEFAULT NULL,
  `socnet_last_reminded` datetime DEFAULT '0000-01-01 00:00:00',
  `moved_from` smallint(5) unsigned DEFAULT NULL,
  `moved_to` smallint(5) unsigned DEFAULT NULL,
  `subscribe_new_buys` tinyint(1) NOT NULL DEFAULT '1',
  PRIMARY KEY (`id`),
  UNIQUE KEY `login` (`login`),
  KEY `s_mail` (`s_mail`),
  KEY `partner` (`partner`),
  KEY `partner_valid_till` (`partner_valid_till`),
  KEY `abonement_expires` (`abonement_expires`,`abonement_left_clicks`),
  KEY `puid` (`s_puid`),
  KEY `s_phone` (`s_phone`),
  KEY `creat_date` (`creat_date`),
  CONSTRAINT `users_ibfk_1` FOREIGN KEY (`partner`) REFERENCES `referrals` (`id`) ON DELETE SET NULL
) ENGINE=InnoDB AUTO_INCREMENT=31592358 DEFAULT CHARSET=utf8