From 3b1c922ba63a1517b43dd4ed07a511d8e380c331 Mon Sep 17 00:00:00 2001
From: "Desai, Kartikey H" <khdesai@mitre.org>
Date: Wed, 18 Sep 2019 10:29:07 -0400
Subject: [PATCH] Fix observed data property check for at least one property
 existing

---
 stix2/v21/sdo.py | 1 -
 1 file changed, 1 deletion(-)

diff --git a/stix2/v21/sdo.py b/stix2/v21/sdo.py
index 8bf76b8..7cd7891 100644
--- a/stix2/v21/sdo.py
+++ b/stix2/v21/sdo.py
@@ -595,7 +595,6 @@ class ObservedData(STIXDomainObject):
 
         self._check_mutually_exclusive_properties(
             ["objects", "object_refs"],
-            at_least_one=False,
         )