diff --git a/forms/ListboxField.php b/forms/ListboxField.php
index 0989da05c..fe4bf487b 100644
--- a/forms/ListboxField.php
+++ b/forms/ListboxField.php
@@ -182,12 +182,6 @@ class ListboxField extends DropdownField {
 			if($fieldname && $record && $relation &&
 				($relation instanceof RelationList || $relation instanceof UnsavedRelationList)) {
 				$idList = (is_array($this->value)) ? array_values($this->value) : array();
-				if(!$record->ID) {
-					$record->write(); // record needs to have an ID in order to set relationships
-					$relation = ($fieldname && $record && $record->hasMethod($fieldname))
-						? $record->$fieldname()
-						: null;
-				}
 				$relation->setByIDList($idList);
 			} elseif($fieldname && $record) {
 				if($this->value) {