DoesNotExist error occurs during deletion if the defer field is present

[KeiKawashima-HEROZ]

When serialize_data=True, a DoesNotExist error occurs during deletion if the defer field is present.

This happens because, with serialize_data=True, it tries to retrieve all fields not listed in serialize_kwargs['fields'], but the record has already been deleted.

django-auditlog/auditlog/models.py

Line 268 in 6414b7a

for field in instance_copy._meta.fields:

It should only attempt to retrieve fields that are explicitly listed in serialize_kwargs['fields'].