From c73cc0a36a4f962d84beb211b61c216017623889 Mon Sep 17 00:00:00 2001
From: Arthur <worldnomad@gmail.com>
Date: Mon, 21 Apr 2025 15:05:15 -0700
Subject: [PATCH] 18500 fix check for cloning mixin

---
 netbox/utilities/querydict.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/netbox/utilities/querydict.py b/netbox/utilities/querydict.py
index 78395758a..73d40bfc4 100644
--- a/netbox/utilities/querydict.py
+++ b/netbox/utilities/querydict.py
@@ -2,6 +2,7 @@ from urllib.parse import urlencode
 
 from django.http import QueryDict
 from django.utils.datastructures import MultiValueDict
+from netbox.models import CloningMixin
 
 __all__ = (
     'dict_to_querydict',
@@ -46,7 +47,7 @@ def prepare_cloned_fields(instance):
     Generate a QueryDict comprising attributes from an object's clone() method.
     """
     # Generate the clone attributes from the instance
-    if not hasattr(instance, 'clone'):
+    if not issubclass(type(instance), CloningMixin):
         return QueryDict(mutable=True)
     attrs = instance.clone()