[maxmorlocke]

Generally speaking, it's inadvisable to 'discard' migrations with django. If the migration set is getting too large, the general practice is to 'squash' migrations, which is a django-supported function for merging the migrations down to a single app. You can do the less blessed, but more simple function of nuking the migrations, updating the migrations table, and remaking your migrations... but you have to coordinate that in every environment.

For an existing database, you can easily create django models for each table, etc. There's a --fake option to update the migration table to make it think you've applied these migrations, but not actually apply them. This convinces django you've brought the database in sync. May your deity or deities help you if you did not actually bring it in sync. I've used this quite a bit in some java ee->python migrations I've done in the past.