Whenever i am trying to read  slide's notes of a simple PPT,it starts throwing error,
The error is as shown
org.apache.poi.openxml4j.exceptions.PartAlreadyExistsException: A part with the name '/ppt/notesSlides/notesSlide1.xml' already exists : Packages shall not contain equivalent part names and package implementers shall neither create nor recognize packages with equivalent part names. [M1.12]
	at org.apache.poi.openxml4j.opc.OPCPackage.createPart(OPCPackage.java:889)
	at org.apache.poi.openxml4j.opc.OPCPackage.createPart(OPCPackage.java:853)
	at org.apache.poi.POIXMLDocumentPart.createRelationship(POIXMLDocumentPart.java:558)
	at org.apache.poi.POIXMLDocumentPart.createRelationship(POIXMLDocumentPart.java:538)
	at org.apache.poi.xslf.usermodel.XMLSlideShow.createNotesSlide(XMLSlideShow.java:299)
	at org.apache.poi.xslf.usermodel.XMLSlideShow.getNotesSlide(XMLSlideShow.java:281)
	at com.ue.cat.filter.openxml.PptxFilter.parseFile(PptxFilter.java:303)
	at com.ue.cat.face.CatInterface.parseFile(CatInterface.java:102)
	at com.ue.cat.filter.pptxFilterTester.testWirtePptx(pptxFilterTester.java:82)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
	at
org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)
	at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:678)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
And my code is:
     try {
 notesSlide = _slideShow.getNotesSlide(slide);
							} catch (Exception e) {
								notesSlide = null;
								e.printStackTrace();
								logger.warn(String.format("用户[userid=%s]在翻译工程[projectid=%s]下的文档[documentid=%s]执行解析原文操作失败!错误详细信息如下:%s", userId, projectId, documentId, "获取备注信息失败！"+e.getMessage()));
							}