TcyS7VjB

1CREATE TABLE IF NOT EXISTS `cupcake`.`Invoice` (   `Quantity` INT NOT NULL,   `TotalPrice` INT NULL,   `Id` INT NOT NULL AUTO_INCREMENT,   `Admin` TINYINT NULL,   `Username` VARCHAR(45) NULL,   PRIMARY KEY (`Id`),   INDEX `Admin_idx` (`Admin` ASC) VISIBLE,   INDEX `Username_idx` (`Username` ASC) VISIBLE,   CONSTRAINT `Admin`     FOREIGN KEY (`Admin`)     REFERENCES `cupcake`.`Admin` (`Admin`)     ON DELETE NO ACTION     ON UPDATE NO ACTION,   CONSTRAINT `Username`     FOREIGN KEY (`Username`)     REFERENCES `cupcake`.`users` (`Username`)     ON DELETE NO ACTION     ON UPDATE NO ACTION) ENGINE = InnoDB	
2
3Error Code: 1826. Duplicate foreign key constraint name 'Username'	0.000 sec