Customer Data Management Customer Merge failed due to Open Orders. How to close sales orders?

Summary:

Context Customer Data Management: We ran the feature allowing party merging. The “Duplicate Resolution Request” ended with a “Rejected” status. A message mentions that ”It is not possible to merge the customer, as they have open orders.”

Content (please ensure you mask any confidential information):

Context Order Management: We ran the below query (1) to identify order with an open status. Two orders are identified as open. These orders are billed and transferred to Fusion AR: one invoice and one credit memo (return).

At line level, the status displayed on screen is “Closed”. At header level, the status is displayed as “Processing”.