How To Fix IWO_BAPI154 - Reservation effectivity/purch. req. 'Immediate' can no longer be changed

IWO_BAPI154 - Overview

• Message type: E = Error

• Message class: IWO_BAPI - BAPIs for ALM Orders: Messages

• Message number: 154

• Message text: Reservation effectivity/purch. req. 'Immediate' can no longer be changed

What causes this issue?

You tried to change the settings of a PM or CS order with regard to the
times when reservations are effective or the issuing of purchase
requisitions. However, the order is configured such that reservations
and purchase requisitions are created immediately. This setting can no
longer be changed.

System Response

The system terminates processing.

How to fix this error?

Check your entries.

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.

IWO_BAPI154 - Details

• The SAP error message "IWO_BAPI154 Reservation effectivity/purch. req. 'Immediate' can no longer be changed" typically occurs in the context of working with reservations or purchase requisitions in SAP. This error indicates that the system is preventing changes to a reservation or purchase requisition that has already been marked as "Immediate," meaning it is already in a state where it cannot be modified.
  
  Cause:
  
  Status of the Reservation/Purchase Requisition: The reservation or purchase requisition has been processed to a point where it is locked for changes. This could be due to it being converted into a purchase order or being part of a production order.
  Time Constraints: The system may have time constraints that prevent changes to immediate requirements once they have been set.
  Configuration Settings: Certain configuration settings in the SAP system may enforce strict rules on how and when reservations or purchase requisitions can be modified.
  
  
  Solution:
  
  Check the Status: Review the status of the