How To Fix DT809 - Field & occurs more than once in the table

DT809 - Overview

• Message type: E = Error

• Message class: DT - Table activation (incl. indexes)

• Message number: 809

• Message text: Field & occurs more than once in the table

What causes this issue?

The field involved occurs several times in the new version of the table
being processed. This is probably because the field was included in an
<DS:TX.APPEND-STRUKTUR>append</> to a table which was included in the
table concerned and, at the same time, a field with this name was
delivered for the first time in the new version of the table.

System Response

The current version of the table cannot be activated.

How to fix this error?

The definition of the table or the append of the include concerned must
be maintained.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DT809 - Field & occurs more than once in the table ?

  The SAP error message DT809 indicates that a field is occurring more than once in a table definition. This typically happens when you are trying to create or modify a table in the Data Dictionary (SE11) or when you are working with structures or database tables that have duplicate field names.
  
  Cause:
  
  Duplicate Field Names: The most common cause of this error is that the same field name has been defined multiple times within the same table or structure.
  Inconsistent Data Model: If you are trying to include fields from different structures or tables that have overlapping field names without proper aliasing or differentiation.
  Copy-Paste Errors: Sometimes, during the creation or modification of a table, fields may be inadvertently copied and pasted, leading to duplicates.
  
  
  Solution:
  
  Check Field Definitions: Go to the Data Dictionary (SE11) and check the table or structure definition. Look for any duplicate field names and remove or rename them as necessary.
  Use Unique