[Invalid ID]

May I know what error this can be?

Database error in vBulletin 3.6.5:

Invalid SQL:

CREATE TABLE IF NOT EXISTS scwho (
         ID INT UNSIGNED PRIMARY KEY NOT NULL AUTO_INCREMENT,
         USERNAME CHAR(255),
         SUBROOM CHAR(255),
         HIDDEN INT UNSIGNED,
         UID INT UNSIGNED,
         ADMIN INT UNSIGNED);

MySQL Error  : Can't create table 'scwho' (errno: 13)
Error Number : 1005
Date         : Wednesday, May 2nd 2007 @ 02:13:40 AM