How To Fix PK221 - Schedule line cannot be changed (GR aleady posted)

PK221 - Overview

• Message type: E = Error

• Message class: PK - Production - KANBAN

• Message number: 221

• Message text: Schedule line cannot be changed (GR aleady posted)

What causes this issue?

Schedule lines for which the goods receipt has already been made
can no longer be changed.

System Response

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

How to fix this error?

Error message extract from SAP system. Copyright SAP SE.

PK221 - Details

• The SAP error message PK221 ("Schedule line cannot be changed (GR already posted)") typically occurs in the context of materials management and logistics when you attempt to change a schedule line in a purchase order or a sales order after goods receipt (GR) has already been posted for that schedule line. This is a protective measure in SAP to maintain data integrity and prevent inconsistencies in inventory and accounting records.
  
  Cause:
  
  Goods Receipt Posted: The primary cause of this error is that a goods receipt has already been posted against the schedule line you are trying to change. Once a GR is posted, the system locks the schedule line to prevent modifications that could lead to discrepancies in inventory and financial records.
  Document Flow: The document flow in SAP is designed to maintain a clear and accurate record of transactions. Changing a schedule line after a GR can disrupt this flow.
  
  
  Solution:
  
  Review the Document