diff --git a/src/Database/Relations/AttachMany.php b/src/Database/Relations/AttachMany.php
index aca72342c..36172083e 100644
--- a/src/Database/Relations/AttachMany.php
+++ b/src/Database/Relations/AttachMany.php
@@ -41,7 +41,7 @@ public function setSimpleValue($value)
     {
         // Nulling the relationship
         if (!$value) {
-            $this->parent->setRelation($this->relationName, null);
+            $this->parent->unsetRelation($this->relationName);
 
             if ($this->parent->exists) {
                 $this->parent->bindEventOnce('model.afterSave', function() {
diff --git a/src/Database/Relations/HasMany.php b/src/Database/Relations/HasMany.php
index dbad14e30..27c74b7bd 100644
--- a/src/Database/Relations/HasMany.php
+++ b/src/Database/Relations/HasMany.php
@@ -37,7 +37,7 @@ public function setSimpleValue($value)
     {
         // Nulling the relationship
         if (!$value) {
-            $this->parent->setRelation($this->relationName, null);
+            $this->parent->unsetRelation($this->relationName);
 
             if ($this->parent->exists) {
                 $this->parent->bindEventOnce('model.afterSave', function() {