Template stopped working due to newly generated device entry after 2026.1.0 update?

[Nid01]

Hi,
I'm not sure if this is issue worthy and if so, if it's an issue with this custom component or home assistant itself.
After updating home assistant from 2025.12.5 to 2026.1.0 nordpool stopped working and after debugging a backup I understood, that the template sensor sensor.nord_pool_ger_eur_kwh_additional_costs had a seemingly wrong device reference.
So my first guess is, that due to the update the the custom component got generated a new device entry, but the template wasn't updated automatically accordingly.

This error originated from a custom integration.

Logger: custom_components.nordpool.sensor
Source: custom_components/nordpool/sensor.py:277
integration: Nord Pool (documentation, issues)
First occurred: January 10, 2026 at 23:57:29 (36 occurrences)
Last logged: 01:00:00

Failed to convert unavailable <class 'str'> to float
Traceback (most recent call last):
  File "/config/custom_components/nordpool/sensor.py", line 277, in _calc_price
    template_value = float(template_value)
ValueError: could not convert string to float: 'unavailable'