PDF displays error dialog after deleting the water mark in c++ (PDFWriter)

Question

I use PDFWriter library to generate a PDF file and add an image to it. Now I need to delete the image from the pdf file once the user click "Delete" button. Here is part of the code:

PDFWriter pdfWriter;

pdfWriter.ModifyPDF(inputFilePath, ePDFVersion13, "");

PDFParser& parser = pdfWriter.GetModifiedFileParser();

ObjectIDType imageID = pdfWriter.GetObjectsContext().GetInDirectObjectsRegistry().AllocateNewObjectID();
StoreInDatabase(imageID);

PDFModifiedPage modifiedPage(&pdfWriter, 0, true);

AbstractContentContext* pContentContext = modifiedPage.StartContentContext();

pContentContext->q();
pContentContext->cm(1, 0, 0, 1, imagePositionX, imagePositionY);

pContentContext->Do(modifiedPage.GetCurrentResourcesDictionary()->AddImageXObjectMapping(imageID));

pContentContext->Q();

modifiedPage.EndContentContext();
modifiedPage.WritePage();


// Create image xobject  
PDFFormXObject* imageXObject = pdfWriter.CreateFormXObjectFromPNGFile(imagePath, imageID);

pdfWriter.EndPDF();

The above code works for adding the image to the pdf as a watermark. Now I need to delete the image from the pdf:

PDFWriter pdfWriter;

pdfWriter.ModifyPDF(strFilePath, ePDFVersion13, strFilePath);

PDFParser& parser = pdfWriter.GetModifiedFileParser();

PDFParser* pdfParser = new PDFParser(parser);

PDFModifiedPage modifiedPage(&pdfWriter, pageIndex, true);

AbstractContentContext* pContentContext = modifiedPage.StartContentContext();
ObjectIDType imageID = GetImageIdFromDatabase();
 pdfWriter.GetObjectsContext().GetInDirectObjectsRegistry().DeleteObject(imageID);

modifiedPage.EndContentContext();
modifiedPage.WritePage();


pdfWriter.EndPDF();

However, after I run this code and open the pdf file, it displays the following dialog:

After I click OK, the pdf displayed correctly.

Is there any way that I can delete the added image without showing the error dialog ?

Here is the something about XObject: https://github.com/galkahana/PDF-Writer/wiki/Using-Form-XObjects

I tried with

pdfWriter.GetObjectsContext().StartNewIndirectObject(imageID);

    pdfWriter.GetObjectsContext().EndIndirectObject();

But none of them can solve my issue.