diff --git a/src/SchemalessAttributes.php b/src/SchemalessAttributes.php
index 26170ee..ee1391e 100644
--- a/src/SchemalessAttributes.php
+++ b/src/SchemalessAttributes.php
@@ -182,7 +182,9 @@ public function getIterator()
 
     protected function getRawSchemalessAttributes(): array
     {
-        return $this->model->fromJson($this->model->getAttributes()[$this->sourceAttributeName] ?? '{}');
+        $attributes = $this->model->getAttributes()[$this->sourceAttributeName] ?? '{}';
+
+        return ($attributes =='""' ? [] : $this->model->fromJson($attributes));
     }
 
     protected function override(iterable $collection)