Django complains about ungenerated migrations on a fresh project with custom storage class

[samupl]

In current version (1.6), on a fresh project, django tries to generate migrations that seem to change the storage class and the choices:

> python manage.py makemigrations
Migrations for 'import_export_celery':
  /usr/local/lib/python3.11/site-packages/import_export_celery/migrations/0010_alter_exportjob_file_alter_importjob_change_summary_and_more.py
    - Alter field file on exportjob
    - Alter field change_summary on importjob
    - Alter field file on importjob
  
> cat /usr/local/lib/python3.11/site-packages/import_export_celery/migrations/0010_alter_exportjob_file_alter_importjob_change_summary_and_more.py
# Generated by Django 4.2.1 on 2023-09-23 14:01

import config.custom_storages
from django.db import migrations
import import_export_celery.fields


class Migration(migrations.Migration):

    dependencies = [
        ('import_export_celery', '0009_alter_exportjob_options_alter_importjob_options_and_more'),
    ]

    operations = [
        migrations.AlterField(
            model_name='exportjob',
            name='file',
            field=import_export_celery.fields.ImportExportFileField(max_length=255, storage=config.custom_storages.TempFileStorage(), upload_to='django-import-export-celery-export-jobs', verbose_name='exported file'),
        ),
        migrations.AlterField(
            model_name='importjob',
            name='change_summary',
            field=import_export_celery.fields.ImportExportFileField(blank=True, null=True, storage=config.custom_storages.TempFileStorage(), upload_to='django-import-export-celery-import-change-summaries', verbose_name='Summary of changes made by this import'),
        ),
        migrations.AlterField(
            model_name='importjob',
            name='file',
            field=import_export_celery.fields.ImportExportFileField(max_length=255, storage=config.custom_storages.TempFileStorage(), upload_to='django-import-export-celery-import-jobs', verbose_name='File to be imported'),
        ),
    ]

This is effectivelly the same issue as reported in #30 but the error is different + I prepared a PR with a fix, so I opened a new issue.

[samupl]

PR with fix: #113