Error de sintaxis

[el_cesar]

Estoy exportando mi bd desde workbench y me da este error, llevo rato buscando y no encuentro a que se refiere

Executing SQL script in server
ERROR: Error 1064: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near '(16) NOT NULL,
`email` (255) NULL,
`password` (32) NOT NULL,
`create_time`' at line 5
SQL Code:
-- -----------------------------------------------------
-- Table `SEMI`.`Usuarios`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `SEMI`.`Usuarios` (
`Username` (16) NOT NULL,
`email` (255) NULL,
`password` (32) NOT NULL,
`create_time` TIMESTAMP NULL DEFAULT CURRENT_TIMESTAMP,
PRIMARY KEY (`Username`))

SQL script execution finished: statements: 29 succeeded, 1 failed

Fetching back view definitions in final form.
Nothing to fetch