From 8518d46d28b6f42e94c0fd17ffe5dedad9ee12e9 Mon Sep 17 00:00:00 2001
From: Erik Montnemery <erik@montnemery.com>
Date: Mon, 18 Dec 2023 14:03:41 +0100
Subject: [PATCH] Avoid mutating entity descriptions in radarr (#105972)

---
 homeassistant/components/radarr/sensor.py | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/homeassistant/components/radarr/sensor.py b/homeassistant/components/radarr/sensor.py
index ab4315b269a..f36516ac05b 100644
--- a/homeassistant/components/radarr/sensor.py
+++ b/homeassistant/components/radarr/sensor.py
@@ -2,8 +2,7 @@
 from __future__ import annotations
 
 from collections.abc import Callable
-from copy import deepcopy
-from dataclasses import dataclass
+import dataclasses
 from datetime import UTC, datetime
 from typing import Any, Generic
 
@@ -39,21 +38,23 @@ def get_modified_description(
     description: RadarrSensorEntityDescription[T], mount: RootFolder
 ) -> tuple[RadarrSensorEntityDescription[T], str]:
     """Return modified description and folder name."""
-    desc = deepcopy(description)
     name = mount.path.rsplit("/")[-1].rsplit("\\")[-1]
-    desc.key = f"{description.key}_{name}"
-    desc.name = f"{description.name} {name}".capitalize()
+    desc = dataclasses.replace(
+        description,
+        key=f"{description.key}_{name}",
+        name=f"{description.name} {name}".capitalize(),
+    )
     return desc, name
 
 
-@dataclass
+@dataclasses.dataclass
 class RadarrSensorEntityDescriptionMixIn(Generic[T]):
     """Mixin for required keys."""
 
     value_fn: Callable[[T, str], str | int | datetime]
 
 
-@dataclass
+@dataclasses.dataclass
 class RadarrSensorEntityDescription(
     SensorEntityDescription, RadarrSensorEntityDescriptionMixIn[T], Generic[T]
 ):