   `registrationID` bigint(20) DEFAULT NULL,
   `status` varchar(255) DEFAULT NULL,
   `expires` datetime DEFAULT NULL,
-  `challenges` varchar(1536) DEFAULT NULL,
   `combinations` varchar(255) DEFAULT NULL,
   `sequence` bigint(20) DEFAULT NULL,
   PRIMARY KEY (`id`),

  `registrationID` bigint(20) DEFAULT NULL,
  `status` varchar(255) DEFAULT NULL,
  `expires` datetime DEFAULT NULL,
  `challenges` varchar(1536) DEFAULT NULL,
  `combinations` varchar(255) DEFAULT NULL,
  `LockCol` bigint(20) DEFAULT NULL,
  PRIMARY KEY (`id`),

  PRIMARY KEY (`serial`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

CREATE TABLE `challenges` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `authorizationID` varchar(255) DEFAULT NULL,
  `type` varchar(255) NOT NULL,
  `status` varchar(255) DEFAULT NULL,
  `error` varchar(255) DEFAULT NULL,
  `validated` datetime DEFAULT NULL,
  `uri` varchar(255) DEFAULT NULL,
  `token` varchar(255) NOT NULL,
  `tls` tinyint(1) DEFAULT NULL,
  `validation` varchar(1536) DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

CREATE TABLE `crls` (
  `serial` varchar(255) NOT NULL,
  `createdAt` datetime NOT NULL,
