How To Fix V1378 - &1 &2 for schedule line &3/&4 can no longer be changed

V1378 - Overview

• Message type: E = Error

• Message class: V1 - Verkaufsbelegbearbeitung

• Message number: 378

• Message text: &1 &2 for schedule line &3/&4 can no longer be changed

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message V1378 - &1 &2 for schedule line &3/&4 can no longer be changed ?

  The SAP error message V1378 indicates that a schedule line in a sales order cannot be changed. This typically occurs when certain conditions are met that prevent modifications to the schedule line. Here’s a breakdown of the cause, potential solutions, and related information for this error:
  
  Cause:
  
  Delivery Creation: The schedule line may have already been processed for delivery. Once a delivery is created for a schedule line, it becomes locked for changes.
  Billing Document: If a billing document has been created for the sales order, the schedule line cannot be modified.
  Status of the Sales Order: The sales order may be in a status that does not allow changes (e.g., completed, closed).
  Custom Settings: There may be custom settings or user exits that restrict changes to schedule lines under certain conditions.
  
  Solutions:
  
  Check Delivery Status: Verify if a delivery has been created for the schedule line. If so, you will need to reverse or delete the