I\'m trying migrate my data id postgresql from string to integers in django to use them in sphinx search. So first of all I\'m making data migration, converting my data to i
To be deal with this problem you have to use 2 steps of migrations.
First : Add db_index=False
on your first migration then generate and run the migration.
Second : Update db_index=True
to your related column in model (according to the first step) then generate the migration and run again.
This based on my experience on some project, and it works.
Hope it helps.