How To Fix WJ204 - Current line &1 already exists in line &2: duplicated key

WJ204 - Overview

• Message type: E = Error

• Message class: WJ - Additionals

• Message number: 204

• Message text: Current line &1 already exists in line &2: duplicated key

What causes this issue?

While creating <GL:additional>additionals</>, you have entered data in
line &V1& that already appears as a <ZH>key</> in line &V2&.
No single combination of sales unit, <GL:class_type>class type</>,
<GL:class>class</> and additional may appear more than once in the
table. This combination forms the (primary) key, that must always be
unique.

How to fix this error?

Check your entries in the current line for the
Sales unit
Class type
Class
Additional
Note:
It is not possible to define more than one
<DS:GLOS.procedure_for_additionals>procedure for affixing an additional
</> per combination of additional, sales unit, class type and class.

Error message extract from SAP system. Copyright SAP SE.

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• What is the cause and solution for SAP error message WJ204 - Current line &1 already exists in line &2: duplicated key ?

  SAP Error Message:
  WJ204 Current line &1 already exists in line &2: duplicated key
  
  
  Cause:
  This error occurs when you try to create or update a record in a table or internal table where the key fields must be unique, but the system detects that the key you are trying to insert or update already exists. In other words, there is a duplicate key conflict.
  
  The message indicates that the current line number (&1) you are processing has the same key values as another line (&2) already present.
  This typically happens during data upload, batch input, or internal table processing where uniqueness of keys is mandatory.
  Common scenarios:
  Attempting to insert a record with a primary key that already exists.
  Internal table processing where duplicate keys are not allowed.
  Data migration or batch input sessions where duplicate entries are present.
  
  
  
  
  
  Solution:
  
  
  Check the Data for Duplicates:
  
  Review the data you are trying to upload or process.
  Identify duplicate entries with the same key