How To Fix FKKMA158 - Choose a unique key

FKKMA158 - Overview

• Message type: E = Error

• Message class: FKKMA - Messages for Master Agreement

• Message number: 158

• Message text: Choose a unique key

What causes this issue?

The entered key exists for simple filters, business-partner-specific
filters, and function modules.

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?

Use the input help to select a unique key.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message FKKMA158 - Choose a unique key ?

  The SAP error message FKKMA158 ("Choose a unique key") typically occurs in the context of the SAP Contract Accounts Receivable and Payable (FI-CA) module. This error indicates that the system requires a unique key for a specific operation, but the provided key is not unique, leading to ambiguity in the data being processed.
  
  Cause:
  
  Duplicate Entries: The most common cause of this error is that there are duplicate entries in the database that match the criteria for the operation you are trying to perform.
  Incorrect Data Input: The user may have entered data that does not uniquely identify a record, such as multiple records with the same reference number or key fields.
  
  Configuration Issues: There may be issues with the configuration of the system that lead to the generation of non-unique keys.
  
  
  Solution:
  
  Check for Duplicates: Review the entries in the relevant tables (e.g., contract accounts, customer accounts) to identify any duplicates. You can use transaction