Special period does not exist

What causes this issue?

The entered special period &V1&, or the special periods that may be
derived from it per company code (table TFK001W), are not valid special
periods for any request item.

System Response

The system cannot post the request.

How to fix this error?

Enter a valid special period.

Procedure for System Administrators

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.