This answer is dependent on whether the BPO was a subaward and was converted into Workday. If the BPO is in Workday, suppliers follow the guidance on the "For Suppliers" webpage, which is to use the uwashington@ghxinvoicing.com.
For SubAwards, they need to work with OSP and GCA to request a new BPO in SAGE.
For Non-Sub Awards, the department creates the replacement BPO in Workday and includes a comment referencing the old BPO# and the GHX email address, uwashington@ghxinvoicing.com