diff --git a/project/src/model/exception/IdSessionDoubleException.php b/project/src/model/exception/IdSessionDoubleException.php
new file mode 100644
index 0000000..856083d
--- /dev/null
+++ b/project/src/model/exception/IdSessionDoubleException.php
@@ -0,0 +1,8 @@
+<?php
+
+namespace model;
+
+class IdSessionDoubleException extends \RuntimeException
+{
+
+}
\ No newline at end of file