Error on upgrade - failed to create index

Troubleshooting
3

Hi, thanks for your help, please see below

mysql> DESCRIBE Schemes;
+-------------------------+--------------+------+-----+---------+-------+
| Field                   | Type         | Null | Key | Default | Extra |
+-------------------------+--------------+------+-----+---------+-------+
| Id                      | varchar(26)  | NO   | PRI | NULL    |       |
| Name                    | varchar(64)  | YES  | UNI | NULL    |       |
| DisplayName             | varchar(128) | YES  |     | NULL    |       |
| Description             | text         | YES  |     | NULL    |       |
| CreateAt                | bigint(20)   | YES  |     | NULL    |       |
| UpdateAt                | bigint(20)   | YES  |     | NULL    |       |
| DeleteAt                | bigint(20)   | YES  |     | NULL    |       |
| Scope                   | varchar(32)  | YES  |     | NULL    |       |
| DefaultTeamAdminRole    | varchar(64)  | YES  |     | NULL    |       |
| DefaultTeamUserRole     | varchar(64)  | YES  |     | NULL    |       |
| DefaultChannelAdminRole | varchar(64)  | YES  |     | NULL    |       |
| DefaultChannelUserRole  | varchar(64)  | YES  |     | NULL    |       |
| DefaultTeamGuestRole    | text         | YES  |     | NULL    |       |
| DefaultChannelGuestRole | text         | YES  |     | NULL    |       |
+-------------------------+--------------+------+-----+---------+-------+
14 rows in set (0.00 sec)


CREATE TABLE `Schemes` (
  `Id` varchar(26) NOT NULL,
  `Name` varchar(64) DEFAULT NULL,
  `DisplayName` varchar(128) DEFAULT NULL,
  `Description` text,
  `CreateAt` bigint(20) DEFAULT NULL,
  `UpdateAt` bigint(20) DEFAULT NULL,
  `DeleteAt` bigint(20) DEFAULT NULL,
  `Scope` varchar(32) DEFAULT NULL,
  `DefaultTeamAdminRole` varchar(64) DEFAULT NULL,
  `DefaultTeamUserRole` varchar(64) DEFAULT NULL,
  `DefaultChannelAdminRole` varchar(64) DEFAULT NULL,
  `DefaultChannelUserRole` varchar(64) DEFAULT NULL,
  `DefaultTeamGuestRole` text,
  `DefaultChannelGuestRole` text,
  PRIMARY KEY (`Id`),
  UNIQUE KEY `Name` (`Name`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4