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

SAP Error Message - Details

• 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.

Smart SAP Assistant

• What is the cause and solution for SAP error message PK221 - Schedule line cannot be changed (GR aleady posted) ?

  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 Flow: Check the document flow for the purchase order or sales order to confirm that a goods receipt has indeed been posted. You can do this by navigating to the relevant transaction (e.g., ME23N for purchase orders) and reviewing the document flow.
  Cancel or Reverse the Goods Receipt: If you need to make changes to the schedule line, you may need to reverse the goods receipt. This can be done using transaction code MIGO or MBST, depending on your system configuration. Note that reversing a GR may have implications for inventory and accounting, so it should be done with caution and in accordance with your organization's policies.
  Create a New Schedule Line: If reversing the GR is not an option, consider creating a new schedule line instead of modifying the existing one. This allows you to maintain the integrity of the original transaction while accommodating the necessary changes.
  Consult with Your SAP Administrator: If you are unsure about the implications of reversing a GR or making changes, consult with your SAP administrator or a colleague with expertise in SAP MM (Materials Management) to ensure that you follow the correct procedures.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as ME23N (Display Purchase Order), MIGO (Goods Movement), and MBST (Cancel Goods Movement).
  SAP Notes: Check SAP Notes for any specific guidance or updates related to this error message. SAP frequently releases notes that provide solutions or workarounds for known issues.
  User Permissions: Ensure that you have the necessary permissions to perform actions like reversing a goods receipt or modifying schedule lines.
  Training and Documentation: Review any internal training materials or documentation related to handling purchase orders and goods receipts in your organization.
  
  By following these steps, you should be able to address the PK221 error and proceed with your required changes in SAP.