java.lang.NullPointerException: null

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java.lang.NullPointerException: null
at org.compiere.model.MPayment.setC_Order_ID(MPayment.java:2821)
at org.compiere.model.MPayment.reverseCorrectIt(MPayment.java:2529)
at org.compiere.model.MPayment.voidIt(MPayment.java:2461)
at org.compiere.process.DocumentEngine.voidIt(DocumentEngine.java:573)
at org.compiere.process.DocumentEngine.processIt0(DocumentEngine.java:368)
at org.compiere.process.DocumentEngine.processIt(DocumentEngine.java:296)
at org.compiere.process.DocumentEngine.processIt(DocumentEngine.java:264)
at de.metas.document.engine.impl.AbstractDocActionBL.processIt(AbstractDocActionBL.java:68)
at org.compiere.model.MPayment.processIt(MPayment.java:1619)
at org.compiere.wf.MWFActivity.performWork(MWFActivity.java:953)
at org.compiere.wf.MWFActivity.run(MWFActivity.java:835)
at org.compiere.wf.MWFProcess.startNext(MWFProcess.java:375)
at org.compiere.wf.MWFProcess.checkActivities(MWFProcess.java:285)
at org.compiere.wf.MWFActivity.setWFState(MWFActivity.java:292)
at org.compiere.wf.MWFActivity.run(MWFActivity.java:855)
at org.compiere.wf.MWFProcess.startWork(MWFProcess.java:507)
at org.compiere.wf.MWorkflow.start(MWorkflow.java:700)
at org.compiere.wf.MWorkflow.startWait(MWorkflow.java:734)
at org.adempiere.util.ProcessUtil.startWorkFlow(ProcessUtil.java:320)
at org.compiere.apps.ProcessCtl.startWorkflow(ProcessCtl.java:609)
at org.compiere.apps.ProcessCtl.run(ProcessCtl.java:402)
at java.lang.Thread.run(Thread.java:745)

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