diff --git a/server-application-server/source/java/ch/systemsx/cisd/openbis/generic/server/dataaccess/db/HibernateSearchDAOV3Adaptor.java b/server-application-server/source/java/ch/systemsx/cisd/openbis/generic/server/dataaccess/db/HibernateSearchDAOV3Adaptor.java
index 1893ff7e5cb084a094994f04b9e1938adec63338..9d2d3da1de4bce606b2e708272affa6dfa90a802 100644
--- a/server-application-server/source/java/ch/systemsx/cisd/openbis/generic/server/dataaccess/db/HibernateSearchDAOV3Adaptor.java
+++ b/server-application-server/source/java/ch/systemsx/cisd/openbis/generic/server/dataaccess/db/HibernateSearchDAOV3Adaptor.java
@@ -167,8 +167,8 @@ public class HibernateSearchDAOV3Adaptor implements IHibernateSearchDAO {
             {
                 registrator.setFirstName("Missing");
                 registrator.setLastName("Missing");
-                registrator.setUserId("Missing");
-                registrator.setEmail("Missing");
+                registrator.setUserId("system");
+                registrator.setEmail("");
                 registrator.setActive(false);
             } else {
                 registrator.setFirstName(registratorPersonPE.getFirstName());