Roll forward period for planning will be reset

What causes this issue?

You have entered a roll forward period for planned independent
requirements, but no consumption mode.

System Response

Since it only makes sense to specify a roll forward period with
consumption, your entry is cancelled by the system.

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.