Upvote:1
According to the Handbook for the processing of visa applications:
If an error is detected by the issuing consulate after the visa sticker has been affixed to the travel document, the visa sticker shall be invalidated by drawing a cross with indelible ink on the visa sticker and a new visa sticker shall be affixed to a different page.
Which means you have to apply to the consulate which issued your visa to receive an updated visa sticker with a proper photo.