The same error occurs when adding entries to the guest book ("Error adding record!") and when you try to register. The code is almost the same.
CREATE TABLE `mysite-local`.`guestbook` ( `id` INT(11) UNSIGNED NOT NULL AUTO_INCREMENT , `name` VARCHAR(255) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL , `comment` TEXT CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL , PRIMARY KEY (`id`)) ENGINE = MyISAM CHARSET=utf8 COLLATE utf8_general_ci;
In phpMyAdmin "MySQL returned an empty result (i.e. zero rows). (Query took 0.0005 sec)"
in the MySQL Manager, the "key index 'zip code 1" does not contain any column"