java.lang.IllegalArgumentException: partName at org.apache.poi.openxml4j.opc.OPCPackage.removePart(OPCPackage.java:1003) at org.apache.poi.openxml4j.opc.OPCPackage.removePart(OPCPackage.java:989) at org.apache.poi.POIXMLDocumentPart.removeRelation(POIXMLDocumentPart.java:335) at org.apache.poi.POIXMLDocumentPart.removeRelation(POIXMLDocumentPart.java:300) at org.apache.poi.xslf.usermodel.XSLFSheet.removePictureRelation(XSLFSheet.java:649) at org.apache.poi.xslf.usermodel.XSLFSheet.removeShape(XSLFSheet.java:333)