PDF/A document: "The document could not be saved. There was a problem reading this document (23)."

Hello,
I have a PDF document that opens successfully in Adobe Acrobat Pro, but it cannot be saved (“Save As”). An error appears: “The document could not be saved. There was a problem reading this document (23).”

Upon examining the document, I found that the issue is caused by the /Info dictionary in the document’s trailer: <</Size 24 /Root 2 0 R /ID [<fcef49423a113ad480365f5897b86db8> <fcef49423a113ad480365f5897b86db8>]
/Info <</Title (Title) /Author (Author) /Subject (Description)>> >>

If this dictionary is removed, the document can be saved without any problem.

I looked into this further and found a note on the PDF Association website—Technical Note 0003: Metadata in PDF/A-1—which states that this dictionary is allowed if the information matches the XMP-encoded metadata. In this case, it does match.

On the other hand, the PDF file successfully passes the veraPDF verification for this compliance level:

I am attaching both the problematic document and the version with the /Info dictionary removed for debugging purposes.