How To Fix PK121 - Maintenance of SD scheduling agreement not possible

PK121 - Overview

• Message type: E = Error

• Message class: PK - Production - KANBAN

• Message number: 121

• Message text: Maintenance of SD scheduling agreement not possible

What causes this issue?

Maintaining the SD delivery schedule/item is not possible for the
following scenarios if the indicator for kanban processing with SD
delivery schedule is not set in the replenishment strategy.

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?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message PK121 - Maintenance of SD scheduling agreement not possible ?

  The SAP error message PK121, which states "Maintenance of SD scheduling agreement not possible," typically occurs when there are issues related to the scheduling agreement in the Sales and Distribution (SD) module. This error can arise due to various reasons, and understanding the cause is essential for finding a solution.
  Causes of PK121 Error
  
  
  Incorrect Document Type: The scheduling agreement may not be of the correct document type that allows for maintenance.
  
  
  Status of the Scheduling Agreement: The scheduling agreement might be in a status that does not permit changes, such as being completed or blocked.
  
  
  Authorization Issues: The user may not have the necessary authorizations to modify the scheduling agreement.
  
  
  Data Inconsistencies: There may be inconsistencies in the data related to the scheduling agreement, such as missing or incorrect information.
  
  
  System Configuration: The system configuration may not allow for the maintenance of scheduling agreements under certain conditions.
  
  
  Locked Entries: The scheduling agreement or related documents may