why it show me this code error SQLSTATE[42000]

I have this code error and i don't know where is the problem when I activate migration

PDOException::("SQLSTATE[42000]: Syntax error or access violation: 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 'unsigned not null, created_at timestamp null, updated_at timestamp null) def' at line 1")

some help please

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