Django 1.8.13 release notes
May 2, 2016
Django 1.8.13 fixes several bugs in 1.8.12.
Bugfixes
- 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).