diff --git a/src/Eccube/Entity/Customer.php b/src/Eccube/Entity/Customer.php
index bdffd93bd86..e1b275c1800 100644
--- a/src/Eccube/Entity/Customer.php
+++ b/src/Eccube/Entity/Customer.php
@@ -32,8 +32,6 @@
 
 /**
  * Customer
- *
- *  @UniqueEntity("email")
  */
 class Customer extends \Eccube\Entity\AbstractEntity implements UserInterface
 {