How To Fix FKKBIX086 - Index not created; an index with the same fields already exists

FKKBIX086 - Overview

• Message type: E = Error

• Message class: FKKBIX - Conv.Inv.: Billing (Invoice Preprocessing)

• Message number: 086

• Message text: Index not created; an index with the same fields already exists

Self-Explanatory Message

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To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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FKKBIX086 - Details

• The SAP error message FKKBIX086 indicates that there is an attempt to create an index in the database, but an index with the same fields already exists. This can occur in various scenarios, particularly when working with financial documents or when trying to optimize database performance.
  
  Cause:
  
  Duplicate Index Creation: The most common cause is that the system is trying to create an index that already exists in the database. This can happen during a system upgrade, data migration, or when running a program that attempts to create indexes without checking for existing ones.
  
  Configuration Issues: Sometimes, the configuration settings in the SAP system may lead to attempts to create indexes that are already defined.
  Custom Development: If there are custom programs or enhancements that attempt to create indexes without proper checks, this error can occur.
  
  
  Solution:
  
  Check Existing Indexes: Use transaction codes like SE11 (Data Dictionary) or SE14 (Database Utility) to check the existing indexes