How To Fix WTADDI_APPL026 - Subsequent action &2 found for additional &1

WTADDI_APPL026 - Overview

• Message type: E = Error

• Message class: WTADDI_APPL - Messages for Application Log LO-ADM/APPL

• Message number: 026

• Message text: Subsequent action &2 found for additional &1

What causes this issue?

An additionals document is created for additional &V1& with
<DS:DE.ADDI_OPER>follow-up action</> &V2&.
&hints&
You can also consult the additionals document in the additionals
monitor. In the additionals monitor you can also check the status of
your follow-up action.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message WTADDI_APPL026 - Subsequent action &2 found for additional &1 ?

  Certainly! Here's a detailed explanation for the SAP error message:
  
  SAP Error Message:
  WTADDI_APPL026: Subsequent action &2 found for additional &1
  
  Meaning / 
  Cause:
  This error occurs in the context of SAP Warehouse Management (WM) or Extended Warehouse Management (EWM), specifically related to Handling Unit (HU) management or Warehouse Task (WT) processing.
  
  The message indicates that a subsequent action (e.g., a follow-up process or step) has already been assigned or found for a particular additional item (additional &1).
  In other words, the system has detected that for the given additional item (could be an additional HU, additional WT, or additional document), a subsequent action (like confirmation, posting, or movement) is already planned or exists.
  This situation typically arises when trying to create or assign a new subsequent action for an item that already has one, which is not allowed or causes a conflict.
  
  
  Typical Scenarios:
  
  Attempting to create a new warehouse task or handling unit for an item that