Translation result & & is too big

What causes this issue?

The result of a conversion between two currencies is an amount which is
too large to be stored.

System Response

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

How to fix this error?

If your input, or the exchange rate in the table TCURR is not
correct, please correct it. If both values are
correct, please replace the transaction with several transactions
involving smaller amounts.

Error message extract from SAP system. Copyright SAP SE.