How To Fix DT963 - Field & in table & is specified twice

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 963

• Message text: Field & in table & is specified twice

What causes this issue?

Two fields of the table have identical names, but field names must be
unique within a table.

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?

Check the names of the table fields and correct them.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DT963 - Field & in table & is specified twice ?

  The SAP error message DT963 indicates that a field is specified more than once in a table definition. This typically occurs during the creation or modification of database tables, structures, or views in the ABAP Dictionary (SE11) or when generating database objects.
  Cause:
  
  Duplicate Field Definition: The most common cause is that the same field name has been defined multiple times in the same table or structure.
  Incorrect Data Element Usage: If a data element is reused inappropriately, it may lead to duplication.
  Copy-Paste Errors: When copying and pasting fields in the table definition, it’s easy to accidentally create duplicates.
  
  Solution:
  
  Check Field Definitions: Go to the table or structure definition in the ABAP Dictionary (SE11) and carefully review the field list. Look for any duplicate field names.
  Remove Duplicates: If you find any duplicate fields, remove or rename them to ensure that each field name is unique within the table or structure.
  Check Data Elements: Ensure that the data elements used for the fields are not causing the duplication. If they are, consider using different data elements or renaming them.
  Activate the Table: After making the necessary changes, try to activate the table or structure again.
  
  Related Information:
  
  Transaction Codes: You can use transaction codes SE11 (Data Dictionary) to view and edit table definitions.
  Field Naming Conventions: Follow SAP naming conventions to avoid confusion and potential duplication.
  Documentation: Refer to SAP documentation or help resources for best practices in defining database objects.
  
  If the issue persists after checking for duplicates, consider looking into any related transport requests or changes that might have affected the table definition.