IW316 - Change of control key not possible because purch. requis. already exists

SAP Error Message - Details

• Message type: E = Error

• Message class: IW - Order Processing

• Message number: 316

• Message text: Change of control key not possible because purch. requis. already exists

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message IW316 - Change of control key not possible because purch. requis. already exists ?

  The SAP error message IW316, which states "Change of control key not possible because purch. requis. already exists," typically occurs in the context of maintenance orders or work orders when there is an attempt to change the control key of an order that has already generated a purchase requisition. This error indicates that the system is preventing the change because it would affect the integrity of the existing purchase requisition.
  Cause:
  
  Existing Purchase Requisition: The primary cause of this error is that a purchase requisition has already been created for the maintenance order or work order. The control key is linked to how the order is processed, and changing it after a requisition has been generated can lead to inconsistencies.
  Control Key Restrictions: Certain control keys have specific functionalities and restrictions. Changing the control key may not be allowed if it alters the nature of the order in a way that conflicts with existing documents.
  
  Solution:
  
  
  Check Existing Purchase Requisitions: Before attempting to change the control key, check if there are any existing purchase requisitions associated with the order. You can do this by navigating to the relevant transaction (e.g., IW33 for display order) and reviewing the purchase requisition details.
  
  
  Cancel or Delete Purchase Requisition: If it is necessary to change the control key, you may need to cancel or delete the existing purchase requisition. This can be done through transaction ME52N (Change Purchase Requisition) or ME54N (Release Purchase Requisition), depending on the status of the requisition. Ensure that this action is in line with your organization's procurement policies.
  
  
  Change Control Key: Once the purchase requisition is removed or canceled, you can proceed to change the control key of the order. This can be done in the order management transaction (e.g., IW32 for changing orders).
  
  
  Consult with Stakeholders: If you are unsure about the implications of changing the control key or deleting the purchase requisition, consult with relevant stakeholders, such as procurement or finance teams, to ensure that the change is appropriate.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as IW32 (Change Order), IW33 (Display Order), ME52N (Change Purchase Requisition), and ME54N (Release Purchase Requisition).
  Documentation: Review SAP documentation or help files related to order management and purchase requisitions for more detailed guidance on control keys and their implications.
  User Authorizations: Ensure that you have the necessary authorizations to make changes to purchase requisitions and orders, as restrictions may apply based on user roles.
  
  By following these steps, you should be able to resolve the IW316 error and proceed with your order management tasks.