Duplicate PDF when merging

[TheProgrammer21]

I try to merge multiple pdf documents to one but my first pdf is in the merged pdf 2 times. (one and a duplicate)
The allPdfs array holds buffers of pdfs.

  const mergedPdf = await PDFDocument.create();
  console.log(allPdfs.length);

  for (const pdfBytes of allPdfs) {
    const pdf = await PDFDocument.load(pdfBytes);
    const copiedPages = await mergedPdf.copyPages(pdf, pdf.getPageIndices());
    copiedPages.forEach((page) => {
      mergedPdf.addPage(page);
    });
  }

When I have 2 pdfs, each one page, my result is a pdf file with 3 pages. The fist page is present 2 times and then the second page (being a third page in the merged pdf) comes.

Any ideas?

[TheProgrammer21]

Nevermind, there was another bug in my code.