What do you think this red splodge is? It looks like someone was like "oops i got red paint on the masterpiece" and not part of it. http://hyper-resolution.org

What do you think this red splodge is? It looks like someone was like "oops i got red paint on the masterpiece" and not part of it. http://hyper-resolution.org/view.html?pointer=0.480,0.002&r=0.5004,0.3507,0.0075,0.0037&i=Rijksmuseum/SK-C-5/SK-C-5_VIS_20-um_2019-12-21 http://hyper-resolution.org/view.html?pointer=0.480,0.002&r=...