SAP Message 6E026 - Flag for balance sheet transfer is being written

Diagnosis
INCLUDE TRLO_EMU_LOAN_KEY OBJECT DOKU ID TX
The account assignment reference has been defined for a particularcurrency in Customizing. As a result of the contract currencychangeover to euro, the account assignment reference has changed.
This means that a balance sheet transfer is necessary.

System Response
The system flags the loan for transfer.

Procedure
To transfer the loan, choose Loan balance sheet transfer.