mysql error code : 1833 해결 방법
http://stackoverflow.com/questions/13606469/cannot-change-column-used-in-a-foreign-key-constraint
내가 생각하는 베스트 답변은 foreign-key-check를 끄는거다. -_-;
SET FOREIGN_KEY_CHECKS = 0; /* DO WHAT YOU NEED HERE */ SET FOREIGN_KEY_CHECKS = 1; This article is licensed under CC BY 4.0 by the author.