mysql error code 1022 duplicate key in table - mysql

Question

I searched through the prior posts but didn't quite find the answer, so here it goes ...
I have this table
CREATE TABLE `leags`
(
`lid` int(10) NOT NULL AUTO_INCREMENT,
`lName` varchar(255) NOT NULL,
`description` varchar(255) DEFAULT NULL,
`links` varchar(255) DEFAULT NULL,
`cid` int(10) NOT NULL,
PRIMARY KEY (`lid`),
KEY `index2` (`lid`,`lName`),
KEY `index3` (`lid`,`lName`,`cid`),
KEY `cid_idx` (`cid`),
CONSTRAINT `cid` FOREIGN KEY (`cid`) REFERENCES `cats` (`cid`)
)
ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8 COMMENT='Leagues'$$
I have another table that has the above PK as a foreign key.
CREATE TABLE `tams`
(
`tId` INT(10) NOT NULL ,
`tName` VARCHAR(255) NOT NULL ,
`lid` INT(10) NULL ,
`url` TEXT NULL ,
PRIMARY KEY (`tId`) ,
INDEX `index2` (`tId` ASC, `tName` ASC) ,
INDEX `index3` (`tId` ASC, `tName` ASC, `lid` ASC) ,
INDEX `lid_idx` (`lid` ASC) ,
CONSTRAINT `lid`
FOREIGN KEY (`lid` )
REFERENCES leags` (`lid` )
ON DELETE NO ACTION
ON UPDATE NO ACTION)
ENGINE = InnoDB
The creation of this table works fine, but I run into a problem creating the below table.
CREATE TABLE IF NOT EXISTS spSched
(
`spscId` INT(10) NOT NULL AUTO_INCREMENT ,
`startDate` DATE NOT NULL ,
`endDate` DATE NULL ,
`startTime` TIME NOT NULL ,
`endTime` TIME NULL ,
`htId` INT(10) NULL ,
`type` VARCHAR(45) NULL ,
`atId` INT(10) NULL ,
`leagId` INT(10) NULL ,
PRIMARY KEY (`spscId`) ,
UNIQUE INDEX `spscId_UNIQUE` (`spscId` ASC) ,
INDEX `htId_idx` (`htId` ASC) ,
INDEX `atId_idx` (`atId` ASC) ,
INDEX `lid_idx` (`leagId` ASC) ,
CONSTRAINT `tId`
FOREIGN KEY (`htId` )
REFERENCES tams (`tId` )
ON DELETE NO ACTION
ON UPDATE NO ACTION,
CONSTRAINT `atId`
FOREIGN KEY (`atId` )
REFERENCES tams` (`tId` )
ON DELETE NO ACTION
ON UPDATE NO ACTION,
CONSTRAINT `lId`
FOREIGN KEY (`leagId` )
REFERENCES leags (`lid` )
ON DELETE NO ACTION
ON UPDATE NO ACTION)
ENGINE = InnoDB
If I remove the lId as a FK and the constraint from the above sql, the table creates just fine. I can't figure out where the duplicate key is in here. All help is much appreciated.
Thanks.

Answer 1

lId you already have a constraint with this name in table tams lid.
I suspect your system is not case sensitive.
http://richardfearn.wordpress.com/2007/03/12/case-insensitive-constraint-names-in-mysql/
internally, InnoDB stores foreign key constraint names as
case-insensitive, with the database name prepended. So although
onedatabase.b_ibfk_1 is treated as different to
anotherdatabase.b_ibfk_1, Photos.b_ibfk_1 and photos.b_ibfk_1 are
treated as the same.
Just pick another name for that key.