Fix update person validation (#30691)

homeassistant/components/person/__init__.py

@@ -214,7 +214,7 @@ class PersonStorageCollection(collection.StorageCollection):
 
         user_id = update_data.get(CONF_USER_ID)
 
-        if user_id is not None:
+        if user_id is not None and user_id != data.get(CONF_USER_ID):
             await self._validate_user_id(user_id)
 
         return {**data, **update_data}

tests/components/person/test_init.py

@@ -514,6 +514,18 @@ async def test_ws_update(hass, hass_ws_client, storage_setup):
             "id": 6,
             "type": "person/update",
             "person_id": persons[0]["id"],
+            "user_id": persons[0]["user_id"],
+        }
+    )
+    resp = await client.receive_json()
+
+    assert resp["success"]
+
+    resp = await client.send_json(
+        {
+            "id": 7,
+            "type": "person/update",
+            "person_id": persons[0]["id"],
             "name": "Updated Name",
             "device_trackers": [DEVICE_TRACKER_2],
             "user_id": None,