Error occurs when refreshing historic data

[RobWaterhouse95]

Describe the bug

When trying to re-populate some of my earliest months, which currently seem to be bugged. I am getting this error:

Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/helpers/script.py", line 526, in _async_step
    await getattr(self, handler)()
  File "/usr/src/homeassistant/homeassistant/helpers/script.py", line 764, in _async_call_service_step
    response_data = await self._async_run_long_action(
                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    ...<9 lines>...
    )
    ^
  File "/usr/src/homeassistant/homeassistant/helpers/script.py", line 727, in _async_run_long_action
    return await long_task
           ^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/core.py", line 2795, in async_call
    response_data = await coro
                    ^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/core.py", line 2838, in _execute_service
    return await target(service_call)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/helpers/service.py", line 1006, in entity_service_call
    single_response = await _handle_entity_call(
                      ^^^^^^^^^^^^^^^^^^^^^^^^^^
        hass, entity, func, data, call.context
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
  File "/usr/src/homeassistant/homeassistant/helpers/service.py", line 1078, in _handle_entity_call
    result = await task
             ^^^^^^^^^^
  File "/config/custom_components/octopus_energy/gas/previous_accumulative_consumption_cubic_meters.py", line 182, in async_refresh_previous_consumption_data
    await async_refresh_previous_gas_consumption_data(
    ...<8 lines>...
    )
  File "/config/custom_components/octopus_energy/statistics/refresh.py", line 164, in async_refresh_previous_gas_consumption_data
    previous_m3_consumption_result =  await async_import_external_statistics_from_consumption(
                                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    ...<9 lines>...
    )
    ^
  File "/config/custom_components/octopus_energy/statistics/consumption.py", line 104, in async_import_external_statistics_from_consumption
    return ImportConsumptionStatisticsResult(statistics[-1]["sum"] if statistics[-1] is not None else 0,
                                                                      ~~~~~~~~~~^^^^
IndexError: list index out of range```

### Reproduction steps

Refresh the Gas kWH entity

### Expected behaviour

The data is repopulated and no errors are thrown

### Tariff Code

G-1R-OE-FIX-12M-24-07-25-D

### Integration Version

13.5.4

### Home Assistant Version

Core 2025.1.3 Supervisor 2024.12.3 Operating System 14.1 Frontend 20250109.0

### Fresh Install?

Not specified

### Home Assistant Logs

File "/usr/src/homeassistant/homeassistant/helpers/script.py", line 526, in _async_step
await getattr(self, handler)()
File "/usr/src/homeassistant/homeassistant/helpers/script.py", line 764, in _async_call_service_step
response_data = await self._async_run_long_action(
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
...<9 lines>...
)
^
File "/usr/src/homeassistant/homeassistant/helpers/script.py", line 727, in _async_run_long_action
return await long_task
^^^^^^^^^^^^^^^
File "/usr/src/homeassistant/homeassistant/core.py", line 2795, in async_call
response_data = await coro
^^^^^^^^^^
File "/usr/src/homeassistant/homeassistant/core.py", line 2838, in _execute_service
return await target(service_call)
^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/src/homeassistant/homeassistant/helpers/service.py", line 1006, in entity_service_call
single_response = await _handle_entity_call(
^^^^^^^^^^^^^^^^^^^^^^^^^^
hass, entity, func, data, call.context
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
)
^
File "/usr/src/homeassistant/homeassistant/helpers/service.py", line 1078, in _handle_entity_call
result = await task
^^^^^^^^^^
File "/config/custom_components/octopus_energy/gas/previous_accumulative_consumption_cubic_meters.py", line 182, in async_refresh_previous_consumption_data
await async_refresh_previous_gas_consumption_data(
...<8 lines>...
)
File "/config/custom_components/octopus_energy/statistics/refresh.py", line 164, in async_refresh_previous_gas_consumption_data
previous_m3_consumption_result = await async_import_external_statistics_from_consumption(
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
...<9 lines>...
)
^
File "/config/custom_components/octopus_energy/statistics/consumption.py", line 104, in async_import_external_statistics_from_consumption
return ImportConsumptionStatisticsResult(statistics[-1]["sum"] if statistics[-1] is not None else 0,
~~~~~~~~~~^^^^
IndexError: list index out of range```

Confirmation

• I confirm that I cannot find my solution within the documentation
• I confirm that I cannot find my solution within the FAQ

[marksteward]

I'm also seeing this, on all dates. I've only just started using this integration, so I'm not sure if it's meant to work, as I don't have a home mini, and it looks from reading between the lines that that's not really supported?

[BottlecapDave]

Thanks for raising this and sorry that you've both encountered this. I'll try and fix it in the next release.

[RobWaterhouse95]

Much appreciated!