You can add it yourself by modifiying the item and let the referee accept it. Pictures like these are good for proving the existence.
I have a soft spot for origami paper cranes.
Read or watch about "Sadako Sasaki and the Thousand Paper Cranes".
Spread a little peace and happiness wherever you go :)
Because administration has nothing to do as both of these signatures already exist, only a yearline with that signature combination has to be added with a change request.
The year lines are open, add a new line with both names of the signers and the refs will validate it as you can clearly provide a proof of its existence.
