mysql在删索引时报错ERROR 1075

问题描述：mysql在删索引时报错ERROR 1075，如下所示：
数据库：mysql 8.0.11
系统：centos 7.9
1、问题重现
create table test_table1
(
id int(11) not null auto_increment,
name char(100) not null,
address char(100),
description char(100),
unique index uniqidx(id),
index multicolidx(name(20),address(30)),
index comidx(description(30))
);

mysql> alter table test_table1 drop index uniqidx;
ERROR 1075 (42000): Incorrect table definition; there can be only one auto column and it must be defined as a key
2、异常原因
删除唯一建需先删除自增，在删除唯一建，此处唯一建所在列为自增属性.主键也是同样的道理.
3、解决过程
--删除字段自增属性.
mysql> alter table test_table1 change id id int(11) not null;
Query OK, 0 rows affected (0.13 sec)
Records: 0  Duplicates: 0  Warnings: 0

mysql> show create table test_table1 \G
*************************** 1. row ***************************
       Table: test_table1
Create Table: CREATE TABLE `test_table1` (
  `id` int(11) NOT NULL,
  `name` char(100) NOT NULL,
  `address` char(100) DEFAULT NULL,
  `description` char(100) DEFAULT NULL,
  UNIQUE KEY `uniqidx` (`id`),
  KEY `multicolidx` (`name`(20),`address`(30)),
  KEY `comidx` (`description`(30))
) ENGINE=InnoDB DEFAULT CHARSET=utf8
1 row in set (0.00 sec)
--再次删除唯一索引
mysql> alter table test_table1 drop index uniqidx;
Query OK, 0 rows affected (0.12 sec)
Records: 0  Duplicates: 0  Warnings: 0

说明：如上所示，索引成功被删除.