java.lang.NullPointerException: null

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java.lang.NullPointerException: null
at org.neo4j.ogm.drivers.embedded.driver.EmbeddedDriver.nativeTransaction(EmbeddedDriver.java:180)
at org.neo4j.ogm.drivers.embedded.driver.EmbeddedDriver.newTransaction(EmbeddedDriver.java:148)
at org.neo4j.ogm.session.transaction.DefaultTransactionManager.openTransaction(DefaultTransactionManager.java:57)
at org.neo4j.ogm.session.delegates.TransactionsDelegate.beginTransaction(TransactionsDelegate.java:37)
at org.neo4j.ogm.session.Neo4jSession.beginTransaction(Neo4jSession.java:441)
at org.neo4j.ogm.session.request.RequestExecutor.executeSave(RequestExecutor.java:84)
at org.neo4j.ogm.session.delegates.SaveDelegate.save(SaveDelegate.java:75)
at org.neo4j.ogm.session.delegates.SaveDelegate.save(SaveDelegate.java:44)
at org.neo4j.ogm.session.Neo4jSession.save(Neo4jSession.java:425)

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