java.lang.NullPointerException: null

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java.lang.NullPointerException: null
at com.orientechnologies.orient.core.index.OIndexAbstract.getVersion(OIndexAbstract.java:787)
at com.stimulus.archiva.database.blueprints.BluePrintDatabaseUtil.dropOldIndexes(BluePrintDatabaseUtil.java:121)
at com.stimulus.archiva.database.blueprints.BluePrintDatabaseUtil.initGraphFactory(BluePrintDatabaseUtil.java:327)
at com.stimulus.archiva.database.blueprints.BluePrintDatabase.connect(BluePrintDatabase.java:86)
at com.stimulus.archiva.database.DatabaseService.startup(DatabaseService.java:328)
at com.stimulus.archiva.domain.Services$ServiceStartup.run(Services.java:169)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)

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