Clone original model

Cloned old model to a new var instead of plain assignment

Insolita@c941655#r61689650

Author: SOHELAHMED7

src/actions/UpdateAction.php

@@ -92,7 +92,7 @@ public function run($id):Item
         if ($this->checkAccess) {
             call_user_func($this->checkAccess, $this->id, $model);
         }
-        $originalModel = $model;
+        $originalModel = clone $model;
         RelationshipManager::validateRelationships($model, $this->getResourceRelationships(), $this->allowedRelations);
         if (empty($this->getResourceAttributes()) && $this->hasResourceRelationships()) {
             $transact = $model::getDb()->beginTransaction();