Upgrade Netbox v4.2.7 to v4.2.9 with Error Application labels aren't unique, duplicates: netbox_topology_views

[mackermann-psi]

I made an upgrade from netbox v4.2.7 to 4.2.9

local_requirements.txt:
 netbox-topology-views==v4.2.1

After I use /opt/netbox/upgrade.sh i got following message

Traceback (most recent call last):
  File "/opt/nb_v41x/netbox/manage.py", line 10, in <module>
    execute_from_command_line(sys.argv)
  File "/opt/nb_v41x/venv/lib/python3.11/site-packages/django/core/management/__init__.py", line 442, in execute_from_command_line
    utility.execute()
  File "/opt/nb_v41x/venv/lib/python3.11/site-packages/django/core/management/__init__.py", line 416, in execute
    django.setup()
  File "/opt/nb_v41x/venv/lib/python3.11/site-packages/django/__init__.py", line 24, in setup
    apps.populate(settings.INSTALLED_APPS)
  File "/opt/nb_v41x/venv/lib/python3.11/site-packages/django/apps/registry.py", line 93, in populate
    raise ImproperlyConfigured(
django.core.exceptions.ImproperlyConfigured: Application labels aren't unique, duplicates: netbox_topology_views

What does it mean??