java.lang.NullPointerException: This exception has no message.

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This exception has no message.
java.lang.NullPointerException:
at com.solarmetric.kodo.impl.jdbc.ormapping.AbstractCollectionMapping.update(AbstractCollectionMapping.java:145)
at com.solarmetric.kodo.impl.jdbc.ormapping.ClassMapping.update(ClassMapping.java:522)
at com.solarmetric.kodo.impl.jdbc.runtime.JDBCStoreManager.update(JDBCStoreManager.java:437)
at com.solarmetric.kodo.runtime.StateManagerImpl.update(StateManagerImpl.java:1755)
at com.solarmetric.kodo.runtime.PDirtyState.flush(PDirtyState.java:29)
at com.solarmetric.kodo.runtime.StateManagerImpl.flush(StateManagerImpl.java:330)
at com.solarmetric.kodo.runtime.PersistenceManagerImpl.flush(PersistenceManagerImpl.java:430)
at com.solarmetric.kodo.runtime.PersistenceManagerImpl.commit(PersistenceManagerImpl.java:295)
at net.nearlythere.business.CoreSiteBuilder.end(CoreSiteBuilder.java:3214)

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