Egyptian prosecutors have sent eight museum workers to a disciplinary court for “gross negligence” after they left scratches on King Tutankhamun’s mask while repairing the goatee section, which got knocked off in 2014. The beard was glued back on with epoxy, but was sent to a German-Egyptian team of specialists last month, who replaced the adhesive with beeswax. In doing so, they left scratches on the famed 3,300-year-old artifact, prosecutors said. The workers face fines and disciplinary measures, and might even be fired, CNN reported.

The mask was discovered in 1992 in an Egyptian tomb by British archaeologists. It became the focus of new research and international interest in Egyptian history. The boy-pharaoh Tutankhamun, affectionately referred to as King Tut, was a pivotal figure of the epoch. The mask has travelled around the world to be displayed at top museums.