Enter a from period

What causes this issue?

The entry of period 0 (zero) as the "from period" is not useful, since
this period gets changes by the balance carried forward program.

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?

Enter a different "from period".

Error message extract from SAP system. Copyright SAP SE.