http://dev.mysql.com/doc/refman/5.6/en/information-schema.html says:
you can only read the contents of tables, not perform INSERT, UPDATE, or DELETE operations on them.
If you want to preserve the triggers and then restore them you could do this:
$ mysqldump --triggers --no-create-db --no-create-info --no-data id2target > triggers.sql
$ mysql id2target < triggers.sql