Ignore utility_meter restore state if state is invalid (#57010)

Co-authored-by: Paulus Schoutsen <balloob@gmail.com>

homeassistant/components/utility_meter/sensor.py

@@ -1,5 +1,6 @@
 """Utility meter from sensors providing raw data."""
 from datetime import date, datetime, timedelta
+import decimal
 from decimal import Decimal, DecimalException
 import logging
 
@@ -323,8 +324,18 @@ class UtilityMeterSensor(RestoreEntity, SensorEntity):
 
         state = await self.async_get_last_state()
         if state:
+            try:
                 self._state = Decimal(state.state)
-            self._unit_of_measurement = state.attributes.get(ATTR_UNIT_OF_MEASUREMENT)
+            except decimal.InvalidOperation:
+                _LOGGER.error(
+                    "Could not restore state <%s>. Resetting utility_meter.%s",
+                    state.state,
+                    self.name,
+                )
+            else:
+                self._unit_of_measurement = state.attributes.get(
+                    ATTR_UNIT_OF_MEASUREMENT
+                )
                 self._last_period = (
                     float(state.attributes.get(ATTR_LAST_PERIOD))
                     if state.attributes.get(ATTR_LAST_PERIOD)