How To Fix S4108 - Field & in table & cannot be specified twice

SAP Error Message - Details

• Message type: E = Error

• Message class: S4 - POPUP_GET_VALUES... and other central functions

• Message number: 108

• Message text: Field & in table & cannot be specified twice

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message S4108 - Field & in table & cannot be specified twice ?

  The SAP error message S4108 indicates that a field in a specified table is being referenced or defined more than once in a context where it should only be specified once. This typically occurs in the context of data dictionary objects, such as when defining a structure, table, or view in the ABAP Dictionary.
  Cause:
  
  Duplicate Field Definition: The most common cause of this error is that the same field is being defined multiple times in a structure or table definition.
  Incorrect Join Conditions: If you are working with database views or joins, this error can occur if the same field is included from multiple tables without proper aliasing.
  Inconsistent Field Names: If you are trying to include fields from different tables that have the same name without proper handling, it can lead to this error.
  
  Solution:
  
  Check Field Definitions: Review the structure or table definition where the error occurs. Ensure that each field is defined only once. Remove any duplicate field definitions.
  Use Aliases: If you are working with views or joins, use aliases for fields that have the same name in different tables to avoid conflicts.
  Modify Data Dictionary Objects: If the error is in a database view or a similar object, consider modifying the view to ensure that fields are uniquely identified.
  Recheck Join Conditions: If applicable, ensure that your join conditions are correctly set up and that you are not unintentionally including the same field from multiple sources.
  
  Related Information:
  
  Transaction Codes: You can use transaction codes like SE11 (Data Dictionary) to check and modify the definitions of tables and structures.
  ABAP Development: If you are developing ABAP programs, ensure that your SELECT statements and data handling do not inadvertently cause this error by including the same field multiple times.
  Documentation: Refer to SAP documentation for more details on data dictionary objects and best practices for defining structures and tables.
  
  By following these steps, you should be able to resolve the S4108 error and ensure that your data definitions are correct and free of duplicates.