Unsubscribe person from device trackers when it is removed (#183319)

Co-authored-by: Claude <noreply@anthropic.com>

homeassistant/components/person/__init__.py

@@ -502,6 +502,13 @@ class Person(
             # as there are attributes that can already be set
             self._update_extra_state_attributes()
 
+    @override
+    async def async_will_remove_from_hass(self) -> None:
+        """Unsubscribe from device trackers when the person is removed."""
+        if self._unsub_track_device is not None:
+            self._unsub_track_device()
+            self._unsub_track_device = None
+
     @override
     async def async_update_config(self, config: ConfigType) -> None:
         """Handle when the config is updated."""

tests/components/person/test_init.py

@@ -1258,6 +1258,7 @@ async def test_ws_delete(
 ) -> None:
     """Test deleting via WS."""
     manager = hass.data[DOMAIN][1]
+    entity = hass.data[DOMAIN][2].get_entity("person.tracked_person")
 
     client = await hass_ws_client(hass)
     persons = manager.async_items()
@@ -1274,6 +1275,12 @@ async def test_ws_delete(
     assert len(hass.states.async_entity_ids(DOMAIN)) == 0
     assert not entity_registry.async_is_registered("person.tracked_person")
 
+    # The removed person no longer follows its device tracker
+    with patch.object(entity, "_update_state") as mock_update_state:
+        hass.states.async_set(DEVICE_TRACKER, "home")
+        await hass.async_block_till_done()
+    mock_update_state.assert_not_called()
+
 
 async def test_ws_delete_require_admin(
     hass: HomeAssistant,