How to unload the old database into a new one if some models have changed?

Question

PostgreSQL

I have a sql and json file of the old version of the Django project, some models have changed in the new version (however, not the data of which I am trying to load), because of this, it is not possible to load the database via psql or loaddata , what could be the way out if Need to upload data to a new version of the site?

Answer 1

Parsing a json file, reformatting for a new database, loading into a new database