java.lang.NullPointerException
	at hudson.model.AbstractProject.getLastBuild(AbstractProject.java:971)
	at hudson.maven.AbstractMavenProject.createTransientActions(AbstractMavenProject.java:184)
	at hudson.model.AbstractProject.updateTransientActions(AbstractProject.java:740)
	at hudson.maven.MavenModule.updateTransientActions(MavenModule.java:485)
	at hudson.model.AbstractProject.save(AbstractProject.java:304)
	at hudson.plugins.disk_usage.DiskUsageProperty.setOwner(DiskUsageProperty.java:150)
	at hudson.model.Job.onLoad(Job.java:213)
	at hudson.model.AbstractProject.onLoad(AbstractProject.java:318)
	at hudson.maven.MavenModule.onLoad(MavenModule.java:283)
	at hudson.model.Items.load(Items.java:279)
	at hudson.model.ItemGroupMixIn.loadChildren(ItemGroupMixIn.java:108)
	at hudson.maven.MavenModuleSet.onLoad(MavenModuleSet.java:790)
	at hudson.model.Items.load(Items.java:279)
	at jenkins.model.Jenkins$18.run(Jenkins.java:2634)
	at org.jvnet.hudson.reactor.TaskGraphBuilder$TaskImpl.run(TaskGraphBuilder.java:169)
	at org.jvnet.hudson.reactor.Reactor.runTask(Reactor.java:282)
	at jenkins.model.Jenkins$7.runTask(Jenkins.java:885)
	at org.jvnet.hudson.reactor.Reactor$2.run(Reactor.java:210)
	at org.jvnet.hudson.reactor.Reactor$Node.run(Reactor.java:117)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:745)