Accounts; Updating Broker and Employee to an invalid combination fails - but the message says "Invalid Employee for Dealer"

If you update an Account and change the Broker and Broker Employee to an invalid combination, the update correctly fails to save, but the error message is "Failed to save Account. Invalid Employee for Dealer.". It should, of course, state "for Broker".

Note, this issue will not occur in the User Interface, only via scripting or data import.