How to change the ownership for subscriptions?

How can I transfer a current subscription to another user account or user?

Background of the question: I have taken out a new subscription during the term of one subscription, so that the two subscriptions overlap in time by a few months. However, both - old and new subscription - are bound to my Manycam account and also activated. I would now like to give away one of the two subscriptions to another user with his own Manycam account. So far I have not found any information about this in the FAQ’s.

Does anyone have any ideas?