changelog missing after upgrade to 3.5 *unrelated to 3.5

[matt-edu]

The upgrade completed without issue, but I'm getting a server error when I try to access the Change Log.
Has anyone else seen this or know how to fix?

Internal Server Error: /extras/changelog/

AttributeError at /extras/changelog/
'NoneType' object has no attribute '_base_manager'

Request Method: GET
Request URL: https://netbox.local/extras/changelog/
Django Version: 4.1.8
Python Executable: /opt/netbox/venv/bin/python3
Python Version: 3.8.10
Python Path: ['/opt/netbox/netbox', '/opt/netbox', '/opt/netbox/venv/bin', '/usr/lib/python38.zip', '/usr/lib/python3.8', '/usr/lib/python3.8/lib-dynload', '/opt/netbox/venv/lib/python3.8/site-packages']
Server time: Tue, 02 May 2023 11:24:13 +0000
Installed Applications:
['django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'django.contrib.humanize',
 'corsheaders',
 'debug_toolbar',
 'graphiql_debug_toolbar',
 'django_filters',
 'django_tables2',
 'django_prometheus',
 'graphene_django',
 'mptt',
 'rest_framework',
 'social_django',
 'taggit',
 'timezone_field',
 'core',
 'circuits',
 'dcim',
 'ipam',
 'extras',
 'tenancy',
 'users',
 'utilities',
 'virtualization',
 'wireless',
 'django_rq',
 'drf_spectacular',
 'drf_spectacular_sidecar']
Installed Middleware:
['graphiql_debug_toolbar.middleware.DebugToolbarMiddleware',
 'django_prometheus.middleware.PrometheusBeforeMiddleware',
 'corsheaders.middleware.CorsMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.clickjacking.XFrameOptionsMiddleware',
 'django.middleware.security.SecurityMiddleware',
 'netbox.middleware.RemoteUserMiddleware',
 'netbox.middleware.CoreMiddleware',
 'django_prometheus.middleware.PrometheusAfterMiddleware']


Traceback (most recent call last):
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/core/handlers/exception.py", line 56, in inner
    response = get_response(request)
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/core/handlers/base.py", line 197, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/views/generic/base.py", line 103, in view
    return self.dispatch(request, *args, **kwargs)
  File "/opt/netbox/netbox/netbox/views/generic/base.py", line 77, in dispatch
    return super().dispatch(request, *args, **kwargs)
  File "/opt/netbox/netbox/utilities/views.py", line 99, in dispatch
    return super().dispatch(request, *args, **kwargs)
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/views/generic/base.py", line 142, in dispatch
    return handler(request, *args, **kwargs)
  File "/opt/netbox/netbox/netbox/views/generic/bulk_views.py", line 184, in get
    return render(request, self.template_name, context)
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/shortcuts.py", line 24, in render
    content = loader.render_to_string(template_name, context, request, using=using)
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/template/loader.py", line 62, in render_to_string
    return template.render(context, request)
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/template/backends/django.py", line 61, in render
    return self.template.render(context)
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/template/base.py", line 175, in render
    return self._render(context)
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/test/utils.py", line 111, in instrumented_test_render
    return self.nodelist.render(context)
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/template/base.py", line 1005, in render
    return SafeString("".join([node.render_annotated(context) for node in self]))
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/template/base.py", line 1005, in <listcomp>
    return SafeString("".join([node.render_annotated(context) for node in self]))
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/template/base.py", line 966, in render_annotated
    return self.render(context)
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/template/loader_tags.py", line 157, in render
    return compiled_parent._render(context)
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/test/utils.py", line 111, in instrumented_test_render
    return self.nodelist.render(context)
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/template/base.py", line 1005, in render
    return SafeString("".join([node.render_annotated(context) for node in self]))
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/template/base.py", line 1005, in <listcomp>
    return SafeString("".join([node.render_annotated(context) for node in self]))
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/template/base.py", line 966, in render_annotated
    return self.render(context)
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/template/loader_tags.py", line 157, in render
    return compiled_parent._render(context)
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/test/utils.py", line 111, in instrumented_test_render
    return self.nodelist.render(context)
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/template/base.py", line 1005, in render
    return SafeString("".join([node.render_annotated(context) for node in self]))
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/template/base.py", line 1005, in <listcomp>
    return SafeString("".join([node.render_annotated(context) for node in self]))
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/template/base.py", line 966, in render_annotated
    return self.render(context)
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/template/loader_tags.py", line 157, in render
    return compiled_parent._render(context)
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/test/utils.py", line 111, in instrumented_test_render
    return self.nodelist.render(context)
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/template/base.py", line 1005, in render
    return SafeString("".join([node.render_annotated(context) for node in self]))
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/template/base.py", line 1005, in <listcomp>
    return SafeString("".join([node.render_annotated(context) for node in self]))
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/template/base.py", line 966, in render_annotated
    return self.render(context)
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/template/loader_tags.py", line 63, in render
    result = block.nodelist.render(context)
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/template/base.py", line 1005, in render
    return SafeString("".join([node.render_annotated(context) for node in self]))
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/template/base.py", line 1005, in <listcomp>
    return SafeString("".join([node.render_annotated(context) for node in self]))
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/template/base.py", line 966, in render_annotated
    return self.render(context)
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/template/loader_tags.py", line 63, in render
    result = block.nodelist.render(context)
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/template/base.py", line 1005, in render
    return SafeString("".join([node.render_annotated(context) for node in self]))
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/template/base.py", line 1005, in <listcomp>
    return SafeString("".join([node.render_annotated(context) for node in self]))
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/template/base.py", line 966, in render_annotated
    return self.render(context)
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/template/base.py", line 1064, in render
    output = self.filter_expression.resolve(context)
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/template/base.py", line 715, in resolve
    obj = self.var.resolve(context)
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/template/base.py", line 847, in resolve
    value = self._resolve_lookup(context)
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/template/base.py", line 914, in _resolve_lookup
    current = current()
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/template/loader_tags.py", line 79, in super
    return mark_safe(self.render(self.context))
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/template/loader_tags.py", line 63, in render
    result = block.nodelist.render(context)
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/template/base.py", line 1005, in render
    return SafeString("".join([node.render_annotated(context) for node in self]))
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/template/base.py", line 1005, in <listcomp>
    return SafeString("".join([node.render_annotated(context) for node in self]))
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/template/base.py", line 966, in render_annotated
    return self.render(context)
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/template/loader_tags.py", line 208, in render
    return template.render(context)
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/template/base.py", line 177, in render
    return self._render(context)
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/test/utils.py", line 111, in instrumented_test_render
    return self.nodelist.render(context)
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/template/base.py", line 1005, in render
    return SafeString("".join([node.render_annotated(context) for node in self]))
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/template/base.py", line 1005, in <listcomp>
    return SafeString("".join([node.render_annotated(context) for node in self]))
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/template/base.py", line 966, in render_annotated
    return self.render(context)
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/template/defaulttags.py", line 541, in render
    return self.nodelist.render(context)
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/template/base.py", line 1005, in render
    return SafeString("".join([node.render_annotated(context) for node in self]))
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/template/base.py", line 1005, in <listcomp>
    return SafeString("".join([node.render_annotated(context) for node in self]))
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/template/base.py", line 966, in render_annotated
    return self.render(context)
  File "/opt/netbox/venv/lib/python3.8/site-packages/django_tables2/templatetags/django_tables2.py", line 166, in render
    return template.render(context={"table": table}, request=request)
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/template/backends/django.py", line 61, in render
    return self.template.render(context)
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/template/base.py", line 175, in render
    return self._render(context)
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/test/utils.py", line 111, in instrumented_test_render
    return self.nodelist.render(context)
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/template/base.py", line 1005, in render
    return SafeString("".join([node.render_annotated(context) for node in self]))
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/template/base.py", line 1005, in <listcomp>
    return SafeString("".join([node.render_annotated(context) for node in self]))
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/template/base.py", line 966, in render_annotated
    return self.render(context)
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/template/defaulttags.py", line 189, in render
    values = self.sequence.resolve(context, ignore_failures=True)
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/template/base.py", line 742, in resolve
    new_obj = func(obj, *arg_vals)
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/template/defaultfilters.py", line 818, in default
    return value or arg
  File "/opt/netbox/venv/lib/python3.8/site-packages/django_tables2/rows.py", line 323, in __len__
    length = len(self.data)
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/db/models/query.py", line 376, in __len__
    self._fetch_all()
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/db/models/query.py", line 1869, in _fetch_all
    self._prefetch_related_objects()
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/db/models/query.py", line 1258, in _prefetch_related_objects
    prefetch_related_objects(self._result_cache, *self._prefetch_related_lookups)
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/db/models/query.py", line 2298, in prefetch_related_objects
    obj_list, additional_lookups = prefetch_one_level(
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/db/models/query.py", line 2440, in prefetch_one_level
    ) = prefetcher.get_prefetch_queryset(instances, lookup.get_current_queryset(level))
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/contrib/contenttypes/fields.py", line 199, in get_prefetch_queryset
    ret_val.extend(ct.get_all_objects_for_this_type(pk__in=fkeys))
  File "/opt/netbox/venv/lib/python3.8/site-packages/django/contrib/contenttypes/models.py", line 185, in get_all_objects_for_this_type
    return self.model_class()._base_manager.using(self._state.db).filter(**kwargs)

Exception Type: AttributeError at /extras/changelog/
Exception Value: 'NoneType' object has no attribute '_base_manager'
Raised during: extras.views.ObjectChangeListView

[jeremystretch]

This is captured by #11335, and happens when the changelog contains a record for a type of object which no longer exists (e.g. because a plugin has been removed.)

[matt-edu]

Thanks! I had removed the netbox-acls plugin before the upgrade.

[kkthxbye-code]

There's a script for nbshell here if you choose to remove the entries:

#7149 (comment)

You would need to play around with the query to find the ContentTypes belonging to the plugin you removed.

[matt-edu]

Thank you! I cleaned it up with nbshell. Fine now.