SAP Message 69308 - Transf. key date &1 must be after contract currency conversion date &2

Diagnosis
The selected key date for the balance sheet transfer &v1& is before theposting date for currency swap postings &v2& for the euro changeover:
Loan &v3& in company code &v4&

Procedure
Adjust the timing of the change that results in the balance sheettransfer, ensuring that the transfer key date falls after the postingdate for the currency swap postings for the contract currencychangeover.
Alternatively, reset the contract currency changeover before you makethe transfer posting.