Django 1.8.13 release notesLink to this heading# May 2, 2016 Django 1.8.13 fixes several bugs in 1.8.12. 버그 수정Link to this heading# Fixed TimeField microseconds round-tripping on MySQL and SQLite (#26498). Restored conversion of an empty string to null when saving values of GenericIPAddressField on SQLite and MySQL (#26557).