diff --git a/model/jpa/src/main/java/org/keycloak/models/jpa/session/PersistentClientSessionEntity.java b/model/jpa/src/main/java/org/keycloak/models/jpa/session/PersistentClientSessionEntity.java
index 8910bca..3ae17b2 100644
--- a/model/jpa/src/main/java/org/keycloak/models/jpa/session/PersistentClientSessionEntity.java
+++ b/model/jpa/src/main/java/org/keycloak/models/jpa/session/PersistentClientSessionEntity.java
@@ -34,7 +34,7 @@ import java.io.Serializable;
@NamedQuery(name="deleteClientSessionsByClient", query="delete from PersistentClientSessionEntity sess where sess.clientId = :clientId"),
@NamedQuery(name="deleteClientSessionsByUser", query="delete from PersistentClientSessionEntity sess where sess.userSessionId IN (select u.userSessionId from PersistentUserSessionEntity u where u.userId = :userId)"),
@NamedQuery(name="deleteClientSessionsByUserSession", query="delete from PersistentClientSessionEntity sess where sess.userSessionId = :userSessionId and sess.offline = :offline"),
- @NamedQuery(name="deleteDetachedClientSessions", query="delete from PersistentClientSessionEntity sess where sess.userSessionId NOT IN (select u.userSessionId from PersistentUserSessionEntity u)"),
+ @NamedQuery(name="deleteDetachedClientSessions", query="delete from PersistentClientSessionEntity sess where NOT EXISTS (select u.userSessionId from PersistentUserSessionEntity u where u.userSessionId = sess.userSessionId )"),
@NamedQuery(name="findClientSessionsByUserSession", query="select sess from PersistentClientSessionEntity sess where sess.userSessionId=:userSessionId and sess.offline = :offline"),
@NamedQuery(name="findClientSessionsByUserSessions", query="select sess from PersistentClientSessionEntity sess where sess.offline = :offline and sess.userSessionId IN (:userSessionIds) order by sess.userSessionId"),
@NamedQuery(name="updateClientSessionsTimestamps", query="update PersistentClientSessionEntity c set timestamp = :timestamp"),
