Two entity on same Ikea device

A have two Ikea gateways on my network (yes - this is not supported by Ikea). Each one of then have two lights and a remote connected.

One light on each gateway is apparantly seen as being part of the same device. I can’t figure out how to split a device into two - or seperate the two entities into their own device.

It seems that I get a lot of errors in the log:

Log Details (ERROR)
Sat Feb 29 2020 11:19:22 GMT+0100 (Central European Standard Time)
Error while setting up tradfri platform for sensor
Traceback (most recent call last):
  File "/usr/local/lib/python3.7/site-packages/pytradfri/api/aiocoap_api.py", line 95, in _get_response
    r = await pr.response
  File "/usr/local/lib/python3.7/site-packages/aiocoap/protocol.py", line 816, in _run_outer
    yield from cls._run(app_request, response, weak_observation, protocol, log, exchange_monitor_factory)
  File "/usr/local/lib/python3.7/site-packages/aiocoap/protocol.py", line 865, in _run
    blockresponse = yield from blockrequest.response
OSError: [Errno -1] No error information

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/helpers/entity_platform.py", line 159, in _async_setup_platform
    await asyncio.wait_for(asyncio.shield(task), SLOW_SETUP_MAX_WAIT)
  File "/usr/local/lib/python3.7/asyncio/tasks.py", line 442, in wait_for
    return fut.result()
  File "/usr/src/homeassistant/homeassistant/components/tradfri/sensor.py", line 15, in async_setup_entry
    devices_commands = await api(gateway.get_devices())
  File "/usr/local/lib/python3.7/site-packages/pytradfri/api/aiocoap_api.py", line 155, in request
    result = await self._execute(api_commands)
  File "/usr/local/lib/python3.7/site-packages/pytradfri/api/aiocoap_api.py", line 146, in _execute
    _, res = await self._get_response(msg)
  File "/usr/local/lib/python3.7/site-packages/pytradfri/api/aiocoap_api.py", line 106, in _get_response
    raise ServerError("There was an error with the request.", e)
pytradfri.error.ServerError: ('There was an error with the request.', OSError(-1, 'No error information'))