How To Fix TB230 - Multiple key fields were defined

SAP Error Message - Details

• Message type: E = Error

• Message class: TB - SM31 table maintenance messages

• Message number: 230

• Message text: Multiple key fields were defined

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message TB230 - Multiple key fields were defined ?

  The SAP error message TB230, which states "Multiple key fields were defined," typically occurs when you are trying to create or modify a table or a data structure in the Data Dictionary (SE11) and you have defined more than one key field for a table that is not allowed to have multiple keys.
  Cause:
  
  Multiple Key Fields: The primary cause of this error is that you have defined more than one field as a key field in a table or structure where only one key field is allowed.
  Incorrect Table Type: The table type you are using may not support multiple key fields. For example, certain types of internal tables or structures may only allow a single key.
  Data Dictionary Constraints: The Data Dictionary has specific rules regarding the definition of keys for tables and structures, and violating these rules will lead to this error.
  
  Solution:
  
  Review Key Field Definitions: Go to the Data Dictionary (SE11) and check the definition of the table or structure. Ensure that you have only one field marked as a key field if the table type does not support multiple keys.
  Change Table Type: If you need to have multiple key fields, consider changing the table type to one that supports multiple keys, such as a transparent table or a pooled table, depending on your requirements.
  Adjust Data Model: If your data model requires multiple keys, you may need to rethink the design. Consider using a composite key or restructuring your data model to accommodate the necessary keys.
  Consult Documentation: Refer to SAP documentation or help resources for specific guidelines on key field definitions for the type of table you are working with.
  
  Related Information:
  
  Transaction Codes: You can use transaction codes like SE11 (Data Dictionary), SE14 (Database Utility), and SE80 (Object Navigator) to manage and troubleshoot table definitions.
  SAP Notes: Check SAP Notes for any known issues or additional guidance related to this error message.
  Community Forums: SAP Community and other forums can provide insights from other users who may have encountered similar issues.
  
  By following these steps, you should be able to resolve the TB230 error and successfully define your table or structure in SAP.