What is wrong with my SQL here? #1089 - Incorrect prefix key

Question

CREATE TABLE `table`.`users` (
    `id` INT(11) NOT NULL AUTO_INCREMENT,
    `username` VARCHAR(50) NOT NULL,
    `password` VARCHAR(50) NOT NULL,
    `dir` VARCHAR(         


        

Answer 1

Problem is the same for me in phpMyAdmin. I just created a table without any const. Later I modified the ID to a Primary key. Then I changed the ID to Auto-inc. That solved the issue.

ALTER TABLE `users` CHANGE `ID` `ID` INT(11) NOT NULL AUTO_INCREMENT;