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function deleteDocumentAncestorsMetadata() {
    whatApp = String(app.name); //String version of the app name
    if (whatApp.search("Photoshop") > 0) { //Check for photoshop specifically, or this will cause errors
        //Function Scrubs Document Ancestors from Files
        if (!documents.length) {
            alert("There are no open documents. Please open a file to run this script.")
            return;
        }
        if (ExternalObject.AdobeXMPScript == undefined) ExternalObject.AdobeXMPScript = new ExternalObject("lib:AdobeXMPScript");
        var xmp = new XMPMeta(activeDocument.xmpMetadata.rawData);
        // Begone foul Document Ancestors!
        xmp.deleteProperty(XMPConst.NS_PHOTOSHOP, "DocumentAncestors");
        app.activeDocument.xmpMetadata.rawData = xmp.serialize();
    	alert("ok")
    }
}
//Now run the function to remove the document ancestors
deleteDocumentAncestorsMetadata();