Unable to extract Documents parts from PPTX

Question

I'm trying to parse a pptx file using Apache Tika, but we got this error Exception in thread "main" org.apache.tika.exception.TikaException: No part found for relationship id=rId6 - container=OPCPackage{packageAccess=READ, relationships=4 relationship(s) = [/_rels/.rels,sourcePart=null,/_rels/.rels], packageProperties=Name: /docProps/core.xml - Content Type: application/vnd.openxmlformats-package.core-properties+xml, isDirty=false} - relationshipType=http://schemas.openxmlformats.org/officeDocument/2006/relationships/oleObject - source=/ppt/slides/slide7.xml - target=/ppt/slides/NULL,targetMode=INTERNAL at org.apache.tika.parser.microsoft.ooxml.XSLFPowerPointExtractorDecorator.getMainDocumentParts(XSLFPowerPointExtractorDecorator.java:302) at org.apache.tika.parser.microsoft.ooxml.AbstractOOXMLExtractor.handleEmbeddedParts(AbstractOOXMLExtractor.java:210) The pptx file can be open using PowerPoint, but it is failing when trying to parse and extract the parts. Why a relationship with a oleObject would have a target=NULL?. Is there a way to fix the 'target=NULL' relationships in the file? Thanks, in advance!