Change pointer has not been activated

What causes this issue?

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

System Response

How to fix this error?

Activate the change pointer in <DS:TRAN./SAPAPO/ORSP>Customizing for
Reservation Planning</> in the activity <LS>Activate Change Pointer</>.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.