From the prepayments detail view you can reassign a prepayment that is attached to a job or layaway.
From the BusinessMind home page click the Sales link
From the View Invoices area search for the prepayment you need to modify. Then select it to bring up the prepayments detail view.
From the prepayments detail view click the edit icon to enter edit mode.
Now you can click on the gear icon and choose the Remove Prepayments Target option which will remove the connection from the prepayment to the layaway or job it is connected to.
At this point you can click into the For field and search and select another job or layaway you want to attach this prepayment to.
Be sure to modify your reference field for the new info. Click the save icon to save your changes.
If you want to remove the attachment and not attach the prepayment to another job or layaway then simply remove the prepayment target , update the reference and for info then save.