[Django]-How to redo makemigrations after getting an error?

1) Identify your last success migration:

./manage.py showmigrations mainapp
[X] 0001_initial
[X] 0002_auto_20160425_0102
[X] 0003_auto_20160426_2022
[X] 0004_auto_20160427_0036

2) Then use migrate to migrate your database to that specified migration point.

 ./manage.py migrate mainapp 0003_auto_20160426_2022

In this example I’m assuming the 0003 migration was success while the 0004 wasn’t.

3) Remove the migration file

rm mainapp/migrations/0004_auto_20160427_0036.py*

4) Run makemigrations and migrate again.