让WSO2 IS 5.0.0.SP1没有使用PostgreSQL进行HA部署我们偶尔会在日志中出现以下异常（我相信用户无法登录，他们需要关闭应用程序（web / mobile）并重试）：
wso2carbon.log
Error while storing session data {org.wso2.carbon.identity.application.authentication.framework.store.SessionDataStore}
org.postgresql.util.PSQLException: ERROR: duplicate key value violates unique constraint "idn_auth_session_store_pkey"
Detail: Key (session_id, session_type)=(315f9b01-6008-4794-b7d8-a76c7cc83102, SAMLSSOParticipantCache) already exists.
at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2198)
at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1927)
at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:255)
at org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:562)
at org.postgresql.jdbc2.AbstractJdbc2Statement.executeWithFlags(AbstractJdbc2Statement.java:420)
at org.postgresql.jdbc2.AbstractJdbc2Statement.executeUpdate(AbstractJdbc2Statement.java:366)
at org.wso2.carbon.identity.application.authentication.framework.store.SessionDataStore.persistSessionData(SessionDataStore.java:363)
at org.wso2.carbon.identity.application.authentication.framework.store.SessionDataPersistTask.run(SessionDataPersistTask.java:54)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
identity.xml中的会话持久性配置：
<SessionDataPersist>
<Enable>true</Enable>
<RememberMePeriod>780</RememberMePeriod>
<CleanUp>
<Enable>true</Enable>
<Period>60</Period>
<TimeOut>781</TimeOut>
</CleanUp>
<Temporary>true</Temporary>
</SessionDataPersist>
任何想法/提示都会受到赞赏..无法使用＆＃34;返回＆＃34;按钮？会话在缓存中持久存在吗？
提前谢谢大家
加布里埃尔