Refactor Sonos alarms and favorites updating (#55529)

homeassistant/components/sonos/switch.py

@@ -37,8 +37,14 @@ async def async_setup_entry(hass, config_entry, async_add_entities):
 
     async def _async_create_entity(speaker: SonosSpeaker, alarm_ids: list[str]) -> None:
         entities = []
+        created_alarms = (
+            hass.data[DATA_SONOS].alarms[speaker.household_id].created_alarm_ids
+        )
         for alarm_id in alarm_ids:
+            if alarm_id in created_alarms:
+                continue
             _LOGGER.debug("Creating alarm %s on %s", alarm_id, speaker.zone_name)
+            created_alarms.add(alarm_id)
             entities.append(SonosAlarmEntity(alarm_id, speaker))
         async_add_entities(entities)