创建mysql表时出错

我执行此脚本时出错：

create table orbeon_form_definition_attach (
created            timestamp(6),
last_modified_time timestamp(6),
last_modified_by   varchar(255)           CHARACTER SET utf8 COLLATE utf8_bin,
app                varchar(255)           CHARACTER SET utf8 COLLATE utf8_bin,
form               varchar(255)           CHARACTER SET utf8 COLLATE utf8_bin,
form_version       int not null,
deleted            char(1)                                   COLLATE utf8_bin        NOT     NULL,
file_name          varchar(255)           CHARACTER SET utf8 COLLATE utf8_bin,
file_content       longblob
)   engine = InnoDB;

错误是：错误代码：1064。您的SQL语法有错误，请检查与您的MySQL服务器版本对应的手册，以了解在第2行0.000秒处varchar255在6、last_modified_time Timestamps6、last_modified_附近使用的正确语法

你知道如何解决这个问题吗？？？

日期时间或时间戳没有长度

create table orbeon_form_definition_attach 
(
created            datetime,
last_modified_time datetime,
last_modified_by   varchar(255)           CHARACTER SET utf8 COLLATE utf8_bin,
app                varchar(255)           CHARACTER SET utf8 COLLATE utf8_bin,
form               varchar(255)           CHARACTER SET utf8 COLLATE utf8_bin,
form_version       int not null,
deleted            char(1)                                   COLLATE utf8_bin        NOT     NULL,
file_name          varchar(255)           CHARACTER SET utf8 COLLATE utf8_bin,
file_content       longblob
)   engine = InnoDB;

从MySQL 5.6.4 time开始，datetime或timestamp可以有一个长度，请参阅