No, you will need to delete the group and add a new group with the different group type selected.
There are two types of Groups in x2VOL, Mandatory and Club/Course type. Once the group is created, the type cannot be changed.
CAUTION: do not delete a group if hours have already been logged by students towards that group's goals.
Please contact your x2VOL Account Manager if you need assistance with changing group types after hours have been logged towards the group and goal.