java.lang.NullPointerException: null

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java.lang.NullPointerException: null
at com.orientechnologies.orient.core.index.OIndexAbstract.getVersion(
at com.stimulus.archiva.database.blueprints.BluePrintDatabaseUtil.dropOldIndexes(
at com.stimulus.archiva.database.blueprints.BluePrintDatabaseUtil.initGraphFactory(
at com.stimulus.archiva.database.blueprints.BluePrintDatabase.connect(
at com.stimulus.archiva.database.DatabaseService.startup(
at com.stimulus.archiva.domain.Services$
at java.util.concurrent.ThreadPoolExecutor.runWorker(
at java.util.concurrent.ThreadPoolExecutor$

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