Remove UniFi config entry reference from device when removing last entity of said device (#56501)

homeassistant/components/unifi/unifi_entity_base.py

@@ -83,6 +83,7 @@ class UniFiBase(Entity):
         Remove entity if no entry in entity registry exist.
         Remove entity registry entry if no entry in device registry exist.
         Remove device registry entry if there is only one linked entity (this entity).
+        Remove config entry reference from device registry entry if there is more than one config entry.
         Remove entity registry entry if there are more than one entity linked to the device registry entry.
         """
         if self.key not in keys:
@@ -102,17 +103,33 @@ class UniFiBase(Entity):
 
         if (
             len(
-                async_entries_for_device(
+                entries_for_device := async_entries_for_device(
                     entity_registry,
                     entity_entry.device_id,
                     include_disabled_entities=True,
                 )
             )
-            == 1
-        ):
+        ) == 1:
             device_registry.async_remove_device(device_entry.id)
             return
 
+        if (
+            len(
+                entries_for_device_from_this_config_entry := [
+                    entry_for_device
+                    for entry_for_device in entries_for_device
+                    if entry_for_device.config_entry_id
+                    == self.controller.config_entry.entry_id
+                ]
+            )
+            != len(entries_for_device)
+            and len(entries_for_device_from_this_config_entry) == 1
+        ):
+            device_registry.async_update_device(
+                entity_entry.device_id,
+                remove_config_entry_id=self.controller.config_entry.entry_id,
+            )
+
         entity_registry.async_remove(self.entity_id)
 
     @property

tests/components/unifi/test_device_tracker.py

@@ -381,6 +381,49 @@ async def test_remove_clients(hass, aioclient_mock, mock_unifi_websocket):
     assert hass.states.get("device_tracker.client_2")
 
 
+async def test_remove_client_but_keep_device_entry(
+    hass, aioclient_mock, mock_unifi_websocket
+):
+    """Test that unifi entity base remove config entry id from a multi integration device registry entry."""
+    client_1 = {
+        "essid": "ssid",
+        "hostname": "client_1",
+        "is_wired": False,
+        "last_seen": 1562600145,
+        "mac": "00:00:00:00:00:01",
+    }
+    await setup_unifi_integration(hass, aioclient_mock, clients_response=[client_1])
+
+    device_registry = dr.async_get(hass)
+    device_entry = device_registry.async_get_or_create(
+        config_entry_id="other",
+        connections={("mac", "00:00:00:00:00:01")},
+    )
+
+    entity_registry = er.async_get(hass)
+    other_entity = entity_registry.async_get_or_create(
+        TRACKER_DOMAIN,
+        "other",
+        "unique_id",
+        device_id=device_entry.id,
+    )
+    assert len(device_entry.config_entries) == 2
+
+    mock_unifi_websocket(
+        data={
+            "meta": {"message": MESSAGE_CLIENT_REMOVED},
+            "data": [client_1],
+        }
+    )
+    await hass.async_block_till_done()
+    await hass.async_block_till_done()
+
+    assert len(hass.states.async_entity_ids(TRACKER_DOMAIN)) == 0
+
+    device_entry = device_registry.async_get(other_entity.device_id)
+    assert len(device_entry.config_entries) == 1
+
+
 async def test_controller_state_change(hass, aioclient_mock, mock_unifi_websocket):
     """Verify entities state reflect on controller becoming unavailable."""
     client = {