Success Plans (SP) switching to new Partners (Customer Name field)

I wanted to find out if Success Plans (SP) can be configurable to switch to new Partners (Customer Name field):

Sometimes, partner will be changed midway or later in the implementation tracking.  Typically if this is a new SP, we would delete it and make a new one, but for mature SPs we do not want to lose all that recorded information. I am curious if there is a better way of managing this or could we configure the customer name field to be able to modify to a new partner?