diff --git a/model/jpa/src/main/java/org/keycloak/models/jpa/session/PersistentUserSessionEntity.java b/model/jpa/src/main/java/org/keycloak/models/jpa/session/PersistentUserSessionEntity.java
index 94aae1e..cc35be2 100644
--- a/model/jpa/src/main/java/org/keycloak/models/jpa/session/PersistentUserSessionEntity.java
+++ b/model/jpa/src/main/java/org/keycloak/models/jpa/session/PersistentUserSessionEntity.java
@@ -34,7 +34,7 @@ import java.io.Serializable;
@NamedQueries({
@NamedQuery(name="deleteUserSessionsByRealm", query="delete from PersistentUserSessionEntity sess where sess.realmId = :realmId"),
@NamedQuery(name="deleteUserSessionsByUser", query="delete from PersistentUserSessionEntity sess where sess.userId = :userId"),
- @NamedQuery(name="deleteDetachedUserSessions", query="delete from PersistentUserSessionEntity sess where sess.userSessionId NOT IN (select c.userSessionId from PersistentClientSessionEntity c)"),
+ @NamedQuery(name="deleteDetachedUserSessions", query="delete from PersistentUserSessionEntity sess where NOT EXISTS (select c.userSessionId from PersistentClientSessionEntity c where c.userSessionId = sess.userSessionId)"),
@NamedQuery(name="findUserSessionsCount", query="select count(sess) from PersistentUserSessionEntity sess where sess.offline = :offline"),
@NamedQuery(name="findUserSessions", query="select sess from PersistentUserSessionEntity sess where sess.offline = :offline order by sess.userSessionId"),
@NamedQuery(name="updateUserSessionsTimestamps", query="update PersistentUserSessionEntity c set lastSessionRefresh = :lastSessionRefresh"),
