vaultwarden/migrations/mysql/2019-05-26-216651_rename_key_and_type_columns/down.sql

ALTER TABLE attachments CHANGE COLUMN akey `key` TEXT;
ALTER TABLE ciphers CHANGE COLUMN atype type INTEGER NOT NULL;
ALTER TABLE devices CHANGE COLUMN atype type INTEGER NOT NULL;
ALTER TABLE twofactor CHANGE COLUMN atype type INTEGER NOT NULL;
ALTER TABLE users CHANGE COLUMN akey `key` TEXT;
ALTER TABLE users_organizations CHANGE COLUMN akey `key` TEXT;
ALTER TABLE users_organizations CHANGE COLUMN atype type INTEGER NOT NULL;