i would like to mention that i got a similar issue

Logger: homeassistant.components.sensor
Source: components/sensor/init.py:503
Integration: Sensor (documentation, issues)
First occurred: 17:37:02 (1 occurrences)
Last logged: 17:37:02

Entity sensor.dcc_sourced_smart_electricity_meter_cost_today (<class 'custom_components.hildebrandglow_dcc.sensor.Cost'>) is using state class 'total_increasing' which is impossible considering device class ('monetary') it is using; Please update your configuration if your entity is manually configured, otherwise report it to the custom integration author.

Yes also seeing this as soon as I updated to Home Assistant 2023.2:

Entity sensor.electric_cost_today (<class 'custom_components.hildebrandglow_dcc.sensor.Cost'>) is using state class 'total_increasing' which is impossible considering device class ('monetary') it is using

I'm looking into this - for the moment it should be safe to just ignore this

I manage to fix the warning my changing

    _attr_state_class = SensorStateClass.TOTAL_INCREASING

to

    _attr_state_class = SensorStateClass.TOTAL

Code where I changed it

class Cost(SensorEntity):
    """Sensor usage for daily cost."""

    _attr_device_class = SensorDeviceClass.MONETARY
    _attr_has_entity_name = True
    _attr_name = "Cost (today)"
    _attr_native_unit_of_measurement = "GBP"
    _attr_state_class = SensorStateClass.TOTAL
    _attr_state_class = SensorStateClass.TOTAL
    _attr_last_reset = None # setting this value when we get reading

I just installed today and am getting the same error, Has the above PR been merged?

@HandyHat Hi, is there any progress with this PR being merged?