diff --git a/doc/82-Changelog.md b/doc/82-Changelog.md
index 6c0eebda9..00d810217 100644
--- a/doc/82-Changelog.md
+++ b/doc/82-Changelog.md
@@ -4,6 +4,16 @@
 Please make sure to always read our [Upgrading](05-Upgrading.md) documentation
 before switching to a new version.
 
+v1.11.1 (unreleased)
+--------------------
+
+### Internals
+* FIX: UserGroup creation failed since v1.10.0 (#2784)
+
+### Fixed issues
+* You can find issues and feature requests related to this release on our
+  [roadmap](https://github.com/Icinga/icingaweb2-module-director/milestone/35?closed=1)
+
 v1.11.0
 -------
 
diff --git a/library/Director/Objects/IcingaObjectGroup.php b/library/Director/Objects/IcingaObjectGroup.php
index 9a61912b9..c076f525d 100644
--- a/library/Director/Objects/IcingaObjectGroup.php
+++ b/library/Director/Objects/IcingaObjectGroup.php
@@ -43,13 +43,15 @@ protected function beforeStore()
                 return;
             }
         } else {
-            if ($this->get('assign_filter') === null) {
+            if ($this->hasProperty('assign_filter') && $this->get('assign_filter') === null) {
                 $this->memberShipShouldBeRefreshed = false;
                 return;
             }
         }
 
-        $this->memberShipShouldBeRefreshed = true;
+        if ($this->hasProperty('assign_filter')) {
+            $this->memberShipShouldBeRefreshed = true;
+        }
     }
 
     protected function notifyResolvers()