In order to move funds to a new settlement account, you will need to create a new payment destination, Information on this can be found here. Please note, all customers linked to the previous destination will need to reconnect so that the new destination account can be added as a beneficiary.
There are two ways of doing this:
1. Either remove the payment source for each customer, and let them run through the Connect() UI again - Note: you must pass the new destination ID in to the connect() method. You will need to remove two records for each customer - The Entity record (link here how to do this) and Payment Source Record (link here how to do this)
2. Or you implement the Update Payment Source() UI (link here), which the user can go through. You must pass the new destination ID into the update Payment Source() method
Also, you must include the new payment destination Id in the payment intent record, when being created.