Override Canvas Groups

[KevinNickels]

Hi,

 I've got a group assignment set up, but one of the two partners in the group was absent and will have to make up the work for this assignment only.  What would be the best way to split up the group for this assignment only to both not allow the second student to see the first student's work as well as give two separate grades?

I've thought of cloning the group set, but I'm not sure what that would do to existing submissions by other groups...

Thanks!