MTO: Re-assign production order to new sales order

The scenario is as follows: I have a production order for a configurable (MTO) material. The customer calls to cancel their order. The manufacturing is half finished (components consumed, labor posted). We sell the exact same unit to another customer under a new sales order.

Question: Can I re-assign the existing production order to the new sales order? If so, how? If not, what am I suggested by SAP to do?