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org.hibernate.MappingException: Unknown entity: null	at org.hibernate.internal.SessionFactoryImpl.getEntityPersister(SessionFactoryImpl.java:1096)	at org.hibernate.internal.SessionImpl.instantiate(SessionImpl.java:1379)	at org.hibernate.ogm.loader.impl.OgmLoader.instanceNotYetLoaded(OgmLoader.java:951)	at org.hibernate.ogm.loader.impl.OgmLoader.getRow(OgmLoader.java:854)	at org.hibernate.ogm.loader.impl.OgmLoader.getRowFromResultSet(OgmLoader.java:427)	at org.hibernate.ogm.loader.impl.OgmLoader.doQuery(OgmLoader.java:338)	at org.hibernate.ogm.loader.impl.OgmLoader.doQueryAndInitializeNonLazyCollections(OgmLoader.java:267)	at org.hibernate.ogm.loader.impl.OgmLoader.loadEntity(OgmLoader.java:186)	at org.hibernate.ogm.loader.impl.OgmLoader.loadEntities(OgmLoader.java:204)	at org.hibernate.ogm.query.impl.OgmQueryLoader.entity(OgmQueryLoader.java:124)	at org.hibernate.ogm.query.impl.OgmQueryLoader.listOfEntities(OgmQueryLoader.java:91)	at org.hibernate.ogm.query.impl.OgmQueryLoader.list(OgmQueryLoader.java:76)	at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:497)	at org.hibernate.ogm.query.impl.OgmQueryTranslator.list(OgmQueryTranslator.java:127)	at org.hibernate.engine.query.spi.HQLQueryPlan.performList(HQLQueryPlan.java:236)	at org.hibernate.internal.SessionImpl.list(SessionImpl.java:1264)	at org.hibernate.internal.QueryImpl.list(QueryImpl.java:103)	at org.hibernate.jpa.internal.QueryImpl.list(QueryImpl.java:573)	at org.hibernate.jpa.internal.QueryImpl.getResultList(QueryImpl.java:449)