diff --git a/src/TagField.php b/src/TagField.php
index 5bbf503..34a5113 100644
--- a/src/TagField.php
+++ b/src/TagField.php
@@ -380,8 +380,6 @@ class TagField extends MultiSelectField
         $titleField = $this->getTitleField();
         $values = $this->Value();
 
-        /** @var Relation $relation */
-        $relation = $record->$name();
         $ids = [];
 
         if (!$values) {
@@ -398,6 +396,9 @@ class TagField extends MultiSelectField
             );
         }
 
+        /** @var Relation $relation */
+        $relation = $record->$name();
+
         foreach ($values as $key => $value) {
             // Get or create record
             $record = $this->getOrCreateTag($value);