Can't write; duplicate key in table '#sql-950b_207'

[Fabien CELAIA]

I'm using MySQL 5.7.17 on RH7

I'm facing any problems converting some innodb tables to archive...

1) duplicate key... without duplicate key

CREATE TABLE `MYTABLE` (
`ID` smallint(5) unsigned NOT NULL AUTO_INCREMENT,
`NAME_FR` varchar(50) DEFAULT NULL,
`NAME_DE` varchar(50) DEFAULT NULL,
`NAME_IT` varchar(50) DEFAULT NULL,
`NAME_EN` varchar(50) DEFAULT NULL,
PRIMARY KEY (`ID`)
) ENGINE=InnoDB AUTO_INCREMENT=7 DEFAULT CHARSET=utf8;

6 lines without duplicate

ALTER TABLE MYTABLE engine=archive ;

Lookup Error - MySQL Database Error: Can't write; duplicate key in table '#sql-950b_476'

2) I'm creating the same table, without AUTO_INCREMENT

ALTER TABLE MYTABLE engine=archive ;

Lookup Error - MySQL Database Error: Got error -1 from storage engine