Django ValueError: Cannot serialize: <User: username> - django

Question

When I'm trying to make migrations of my models in Django, I keep getting the same error, even after I've commented out all the changes:
(.venv) C:\Users\jezdo\venv\chat\chat_proj>python manage.py makemigrations chat
Migrations for 'chat':
chat\migrations\0002_alter_customusergroup_custom_group_name_and_more.py
- Alter field custom_group_name on customusergroup
- Alter field users on customusergroup
Traceback (most recent call last):
File "C:\Users\jezdo\.venv\chat\chat_proj\manage.py", line 22, in <module>
main()
File "C:\Users\jezdo\.venv\chat\chat_proj\manage.py", line 18, in main
execute_from_command_line(sys.argv)
File "C:\Users\jezdo\.venv\lib\site-packages\django\core\management\__init__.py", line 446, in execute_from_command_line
utility.execute()
File "C:\Users\jezdo\.venv\lib\site-packages\django\core\management\__init__.py", line 440, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "C:\Users\jezdo\.venv\lib\site-packages\django\core\management\base.py", line 402, in run_from_argv
self.execute(*args, **cmd_options)
File "C:\Users\jezdo\.venv\lib\site-packages\django\core\management\base.py", line 448, in execute
output = self.handle(*args, **options)
File "C:\Users\jezdo\.venv\lib\site-packages\django\core\management\base.py", line 96, in wrapped
res = handle_func(*args, **kwargs)
File "C:\Users\jezdo\.venv\lib\site-packages\django\core\management\commands\makemigrations.py", line 239, in handle
self.write_migration_files(changes)
File "C:\Users\jezdo\.venv\lib\site-packages\django\core\management\commands\makemigrations.py", line 278, in write_migration_files
migration_string = writer.as_string()
File "C:\Users\jezdo\.venv\lib\site-packages\django\db\migrations\writer.py", line 141, in as_string
operation_string, operation_imports = OperationWriter(operation).serialize()
File "C:\Users\jezdo\.venv\lib\site-packages\django\db\migrations\writer.py", line 99, in serialize
_write(arg_name, arg_value)
File "C:\Users\jezdo\.venv\lib\site-packages\django\db\migrations\writer.py", line 63, in _write
arg_string, arg_imports = MigrationWriter.serialize(_arg_value)
File "C:\Users\jezdo\.venv\lib\site-packages\django\db\migrations\writer.py", line 282, in serialize
return serializer_factory(value).serialize()
File "C:\Users\jezdo\.venv\lib\site-packages\django\db\migrations\serializer.py", line 221, in serialize
return self.serialize_deconstructed(path, args, kwargs)
File "C:\Users\jezdo\.venv\lib\site-packages\django\db\migrations\serializer.py", line 99, in serialize_deconstructed
arg_string, arg_imports = serializer_factory(arg).serialize()
File "C:\Users\jezdo\.venv\lib\site-packages\django\db\migrations\serializer.py", line 50, in serialize
item_string, item_imports = serializer_factory(item).serialize()
File "C:\Users\jezdo\.venv\lib\site-packages\django\db\migrations\serializer.py", line 50, in serialize
item_string, item_imports = serializer_factory(item).serialize()
File "C:\Users\jezdo\.venv\lib\site-packages\django\db\migrations\serializer.py", line 386, in serializer_factory
raise ValueError(
ValueError: Cannot serialize: <User: jezdo>
There are some values Django cannot serialize into migration files.
For more, see https://docs.djangoproject.com/en/4.1/topics/migrations/#migration-serializing
my model in models.py:
class CustomUserGroup(models.Model):
custom_group_name = models.CharField(max_length=50, unique=True)
users= MultiSelectField(max_length=100,choices=users_list,unique=False)
class Meta:
verbose_name_plural = 'Custom Groups'
ordering = ['custom_group_name']
def __unicode__(self):
return self.custom_group_name
I wanted to create another model similar to CustomUserGroup byt with a different "users" field:
class CustomUserGroup2(models.Model):
custom_group_name = models.CharField(max_length=50, unique=True)
users= models.ManyToManyField(User)
class Meta:
verbose_name_plural = 'Custom Groups'
ordering = ['custom_group_name']
def __unicode__(self):
return self.custom_group_name
but couldn't makemigrations due to the described error. Now I cannot make any migrations whatsoever, even after having deleted the CustomUserGroup2 class.
I'm using Python 3.10.4 and Django 4.1.6.