old_contents: from django.conf import settings
  from fabtastic.db import util
  
  db_engine = util.get_db_setting('ENGINE')
  
  if 'postgresql_psycopg2' in db_engine:
      from fabtastic.db.postgres import *
  else:
      raise NotImplementedError("Fabtastic: DB engine '%s' is not supported" % db_engine)
new_contents: from django.conf import settings
  from fabtastic.db import util
  
  db_engine = util.get_db_setting('ENGINE')
  
  if 'postgresql_psycopg2' in db_engine:
      from fabtastic.db.postgres import *
  else:
      print("Fabtastic WARNING: DB engine '%s' is not supported" % db_engine)
  
subject: Make the warning for SQLite not being supported a print instead of an exception.