ALTER TABLE `vn2008`.`Articles_nicho` 
DROP FOREIGN KEY `Articles_nichos_fk`;
ALTER TABLE `vn2008`.`Articles_nicho` 
CHANGE COLUMN `Id_Article` `Id_Article` INT(11) NOT NULL ,
ADD COLUMN `id` INT NOT NULL AUTO_INCREMENT AFTER `modificationDate`,
DROP PRIMARY KEY,
ADD PRIMARY KEY (`id`);
ALTER TABLE `vn2008`.`Articles_nicho` 
ADD CONSTRAINT `Articles_nichos_fk`
  FOREIGN KEY (`Id_Article`)
  REFERENCES `vn2008`.`Articles` (`Id_Article`)
  ON DELETE CASCADE
  ON UPDATE CASCADE;