How To Fix FAGL_MIG026 - Error during validation: Field &1 incorrectly filled

FAGL_MIG026 - Overview

• Message type: E = Error

• Message class: FAGL_MIG - Migration to New General Ledger Accounting

• Message number: 026

• Message text: Error during validation: Field &1 incorrectly filled

What causes this issue?

In BAdI <ZK>FAGL_MIGR_SUBST</>, you have changed a field so that the
function module <ZK>K_COBL_CHECK</> has changed the content of a field
that was already filled before the BAdI was called. Such a field change
is not permitted. Fields that are already filled may <ZH>not </>be
changed.
You may only replace dummy profit centers.

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 BAdI <ZK>FAGL_MIGR_SUBST</>.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

FAGL_MIG026 - Details

• The SAP error message FAGL_MIG026 typically occurs during the migration process when using the New General Ledger (New GL) functionality. This error indicates that there is an issue with the data being validated, specifically that a certain field (denoted by &1) is incorrectly filled or does not meet the required criteria.
  
  Cause:
  The error can be caused by several factors, including:
  
  Incorrect Data Format: The data in the specified field may not conform to the expected format (e.g., numeric values where text is expected).
  Missing Required Fields: Certain mandatory fields may not have been filled in during the migration process.
  Inconsistent Data: The data being migrated may not be consistent with the existing data in the system, leading to validation failures.
  
  Configuration Issues: There may be configuration settings in the New GL that are not aligned with the data being migrated.
  
  
  Solution:
  To resolve the FAGL_MIG026 error, you can take the following steps:
  
  Check the Error Message Details: Look