Resetting password - cannot complete the onboarding process ("Name is already in use" in logs)

I stopped docker and deleted both the ‘.storage/auth’ and ‘.storage/auth_provider.homeassistant’ files then restarted docker. While trying to login I’m redirected to the onboarding system. After filling out the fields the logs say:

2019-12-04 15:20:07 ERROR (MainThread) [aiohttp.server] Error handling request
Traceback (most recent call last):
  File "/usr/local/lib/python3.7/site-packages/aiohttp/", line 418, in start
    resp = await task
  File "/usr/local/lib/python3.7/site-packages/aiohttp/", line 458, in _handle
    resp = await handler(request)
  File "/usr/local/lib/python3.7/site-packages/aiohttp/", line 119, in impl
    return await handler(request)
  File "/usr/src/homeassistant/homeassistant/components/http/", line 40, in real_ip_middleware
    return await handler(request)
  File "/usr/src/homeassistant/homeassistant/components/http/", line 73, in ban_middleware
    return await handler(request)
  File "/usr/src/homeassistant/homeassistant/components/http/", line 136, in auth_middleware
    return await handler(request)
  File "/usr/src/homeassistant/homeassistant/components/http/", line 122, in handle
    result = await result
  File "/usr/src/homeassistant/homeassistant/components/http/", line 48, in wrapper
    result = await method(view, request, *args, **kwargs)
  File "/usr/src/homeassistant/homeassistant/components/onboarding/", line 125, in post
  File "/usr/src/homeassistant/homeassistant/helpers/", line 56, in async_create
    raise ValueError("Name is already in use")
ValueError: Name is already in use

How can I complete the onboarding process and get back into my HA installation.

I’m pretty sure this is a duplicate thread. I could swear this was already discussed.