Just send a PM to Xavier here. Explain your case and give him the name of the other member along with the new rating and the new comment.
Sapientiae plerumque stultitia est comes.
Si c'est un grand plaisir d'être reconnu par ses amis, c'est peut-être encore plus flatteur d'être reconnu par ses adversaires.
Be yourself; everyone else is already taken.
Hi
There are not many such requests, at least not publicly. But fine addition to the Numista would be a possibility that this is agreed between two swappers - no need for bothering admin, so that one user has to allow the change for other to make (maybe only for the better rate in amount of stars given).
LP