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  1. ,
    Expert tip

    Try downgrading PostgresSQL server to 9.5 or update your PostgresSQL driver to 9.4-1211 with the following command: <postgresql.version>9.4.1211</postgresql.version>

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org.postgresql.util.PSQLException: ERROR: column reference "_is_active" is ambiguous	at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:1608)	at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1343)	at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:194)	at org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:451)	at org.postgresql.jdbc2.AbstractJdbc2Statement.executeWithFlags(AbstractJdbc2Statement.java:350)	at org.postgresql.jdbc2.AbstractJdbc2Statement.executeQuery(AbstractJdbc2Statement.java:254)	at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:208)	at org.hibernate.loader.Loader.getResultSet(Loader.java:1808)	at org.hibernate.loader.Loader.doQuery(Loader.java:697)	at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:259)	at org.hibernate.loader.Loader.doList(Loader.java:2228)	at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:90)	at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66)	at org.hibernate.loader.Loader.doList(Loader.java:2231)	at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2125)	at org.hibernate.loader.Loader.list(Loader.java:2120)	at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:401)	at org.hibernate.hql.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:361)	at org.hibernate.engine.query.HQLQueryPlan.performList(HQLQueryPlan.java:196)	at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1148)	at org.hibernate.impl.QueryImpl.list(QueryImpl.java:102)	at org.hibernate.ejb.QueryImpl.getSingleResult(QueryImpl.java:88)