Workaround for new Cart validation when Department is entered at the Header?

Summary:

Looking for a workaround to manage the new Cart charge account validation since our users only enter the department at the header level right before submission.

Content (please ensure you mask any confidential information):

With the new update (Bug 39117588), the system validates the charge account upon loading the cart, triggering immediate errors.This is causing confusion due to our business process: our users do not include the department, and therefore the charge account, until they access the header data right before submitting the requisition.What workaround or best practice can you recommend to manage this new behavior and avoid user confusion, considering how our department operates?