java.lang.AssertionError: isPartOfKey should have been true in this case
        at org.hibernate.sql.results.graph.embeddable.AbstractEmbeddableInitializer.isParentInstanceNull(AbstractEmbeddableInitializer.java:266)
        at org.hibernate.sql.results.graph.embeddable.AbstractEmbeddableInitializer.initializeInstance(AbstractEmbeddableInitializer.java:176)
        at org.hibernate.sql.results.internal.InitializersList.initializeInstance(InitializersList.java:70)
        at org.hibernate.sql.results.internal.StandardRowReader.coordinateInitializers(StandardRowReader.java:111)
        at org.hibernate.sql.results.internal.StandardRowReader.readRow(StandardRowReader.java:87)
        at org.hibernate.sql.results.spi.ListResultsConsumer.consume(ListResultsConsumer.java:199)
        at org.hibernate.sql.results.spi.ListResultsConsumer.consume(ListResultsConsumer.java:33