diff --git a/src/Database/Models/DeferredBinding.php b/src/Database/Models/DeferredBinding.php
index b00c5175f..30cedbfa8 100644
--- a/src/Database/Models/DeferredBinding.php
+++ b/src/Database/Models/DeferredBinding.php
@@ -206,7 +206,7 @@ protected function deleteSlaveRecord()
 
             // Only delete it if the relationship is null
             $foreignKey = array_get($options, 'key', $masterObject->getForeignKey());
-            if (!$relatedObj->$foreignKey) {
+            if ($foreignKey && !$relatedObj->$foreignKey) {
                 $relatedObj->delete();
             }
         }