why Mysql is giving me error 1280 "Wrong Index" - mysql

Question

Can anyone explain why Mysql is giving me error 1280 ("wrong index for 'fk_chart_aid_aid' ") error whend I try to create the "CHART OF ACCOUNTS" table. I'm completly confused here. How can I fix this so I can create the table? The "ACCOUNT" table already exists in the database and has data in it.
Thanks for the help.
MYSQL Server version: 5.1.54
CHART OF ACCOUNTS:
DROP TABLE IF EXISTS `rst`.`acctg_chart_of_accounts` ;
CREATE TABLE IF NOT EXISTS `rst`.`acctg_chart_of_accounts` (
`acctg_chart_of_accounts_id` INT UNSIGNED NOT NULL AUTO_INCREMENT ,
`account_id` INT UNSIGNED NOT NULL ,
`account_nbr` VARCHAR(45) NULL ,
`description` VARCHAR(45) NULL ,
`account_type` INT UNSIGNED NULL ,
`commissionable` TINYINT UNSIGNED NULL ,
`hidden` TINYINT UNSIGNED NULL ,
`deduct_balance_from_owner_check` TINYINT UNSIGNED NULL ,
PRIMARY KEY (`acctg_chart_of_accounts_id`) ,
CONSTRAINT `fk_chart_aid_aid`
FOREIGN KEY (`account_id` )
REFERENCES `rst`.`account` (`account_id` )
ON DELETE CASCADE
ON UPDATE CASCADE)
ENGINE = InnoDB;
CREATE INDEX `fk_chart_aid_aid` ON `rst`.`acctg_chart_of_accounts` (`account_id` ASC) ;
ACCOUNTS TABLE THAT IS BEING REFERENCED:
CREATE TABLE IF NOT EXISTS `account` (
`account_id` int(10) unsigned NOT NULL AUTO_INCREMENT,
`account_status_id` int(10) unsigned NOT NULL,
`company_name` varchar(155) DEFAULT NULL,
`address1` varchar(155) DEFAULT NULL,
`address2` varchar(155) DEFAULT NULL,
`city` varchar(155) DEFAULT NULL,
`state` varchar(155) DEFAULT NULL,
`zip` varchar(45) DEFAULT NULL,
`country` varchar(255) DEFAULT NULL,
`work_phone` varchar(45) DEFAULT NULL,
`mobile_phone` varchar(45) DEFAULT NULL,
`time_zone` varchar(45) DEFAULT NULL,
`subdomain` varchar(155) DEFAULT NULL,
`cname_URL` varchar(255) DEFAULT NULL,
`promotion_code` varchar(45) DEFAULT NULL,
`can_we_contact_you` tinyint(4) DEFAULT NULL COMMENT '0=false, 1=true',
`units_managed_nbr` varchar(10) DEFAULT NULL,
`a_hear_about_us_list_id` tinyint(3) unsigned DEFAULT NULL COMMENT 'populated from dropdown list.',
`receive_special_offers` tinyint(4) DEFAULT NULL,
`receive_announcements` tinyint(4) DEFAULT NULL,
`receive_newsletter` tinyint(4) DEFAULT NULL,
`create_ts` timestamp NULL DEFAULT NULL,
`expires` timestamp NULL DEFAULT NULL,
`storage_capacity` varchar(255) DEFAULT NULL COMMENT '1073741824 = 1GB',
`logo` varchar(455) DEFAULT NULL,
`max_active_connections` int(11) DEFAULT '3',
`_product_id` int(11) DEFAULT NULL,
`report_footer` varchar(455) DEFAULT NULL,
`welcome_dialog` tinyint(4) DEFAULT '1',
`ARB_subscription_id` int(11) DEFAULT NULL,
`trashbin` tinyint(4) NOT NULL DEFAULT '1',
PRIMARY KEY (`account_id`),
KEY `fk_account_account_status_id` (`account_status_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 AUTO_INCREMENT=58 ;

Answer 1

Are you getting the error after the CREATE TABLE statement, or after the subsequent CREATE INDEX?
Looks like you are attempting to name both a FOREIGN KEY constraint and an INDEX fk_chart_aid_aid. Try choosing a different name for either one of them.
Also, in the accounts table, account_id is INT(10). Try also to change the column definition in acctg_chart_of_accounts to:
`account_id` INT(10) UNSIGNED NOT NULL ,
Though, I think that mysql defaults type INT to INT(10) anyway...

Answer 2

I met the same issue; tried manually rename the index to a different name but don't like the idea of 'manually' and neither I don't really understand why we need to generate the index separately. so I decide to generate it within the create statement by unchecking the option of 'generate separate index statement' in 'forwarding engineer', and this fix the issue.