diff --git a/src/wagtail_personalisation/views.py b/src/wagtail_personalisation/views.py
index 8f4df4e..ee419e5 100644
--- a/src/wagtail_personalisation/views.py
+++ b/src/wagtail_personalisation/views.py
@@ -139,7 +139,7 @@ def copy_page_view(request, page_id, segment_id):
         }
 
         try:
-            variant = Page.objects.get(slug=slug, depth=page.depth)
+            variant = Page.objects.get(slug=slug, parent=page.parent)
         except Page.DoesNotExist:
             variant = page.copy(update_attrs=update_attrs, copy_revisions=False)