From b5da5a46de71ae5f5d5a6ebb6f156eaca7af2b03 Mon Sep 17 00:00:00 2001
From: Lance Edgar <lance@edbob.org>
Date: Wed, 1 Nov 2023 17:47:07 -0500
Subject: [PATCH] Avoid error when rendering version diff

can't always assume relationship entities are versioned
---
 tailbone/diffs.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tailbone/diffs.py b/tailbone/diffs.py
index 1c73635a..cdf35830 100644
--- a/tailbone/diffs.py
+++ b/tailbone/diffs.py
@@ -195,7 +195,7 @@ class VersionDiff(Diff):
 
                 ref = getattr(version, prop.key)
                 if ref:
-                    ref = ref.version_parent
+                    ref = getattr(ref, 'version_parent', None)
                     if ref:
                         return HTML.tag('span', c=[
                             text,