java.lang.NullPointerException
	at org.apache.jackrabbit.core.version.InternalVersionImpl.storeXCessors(InternalVersionImpl.java:225)
	at org.apache.jackrabbit.core.version.InternalVersionImpl.internalAddSuccessor(InternalVersionImpl.java:281)
	at org.apache.jackrabbit.core.version.InternalVersionImpl.internalAttach(InternalVersionImpl.java:265)
	at org.apache.jackrabbit.core.version.InternalVersionHistoryImpl.checkin(InternalVersionHistoryImpl.java:492)
	at org.apache.jackrabbit.core.version.AbstractVersionManager.checkin(AbstractVersionManager.java:381)
	at org.apache.jackrabbit.core.version.VersionManagerImpl$2.run(VersionManagerImpl.java:302)
	at org.apache.jackrabbit.core.version.VersionManagerImpl$DynamicESCFactory.doSourced(VersionManagerImpl.java:579)
	at org.apache.jackrabbit.core.version.VersionManagerImpl.checkin(VersionManagerImpl.java:298)
	at org.apache.jackrabbit.core.version.XAVersionManager.checkin(XAVersionManager.java:162)
	at org.apache.jackrabbit.core.NodeImpl.checkin(NodeImpl.java:2957)