Cannot carry forward balance for CoCcde & because & converted to euro

What causes this issue?

In fiscal year &V2&, a local currency in company code &V1& was
converted to euro. You are now prevented from being able to run a
balance carried forward program, both for this fiscal year, and for all
previous years. This is because your accounts could no longer agree.

System Response

The system terminates processing.

How to fix this error?

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.