How To Fix CNV_20800066 - &1: hidden field &2 does not contain a value

CNV_20800066 - Overview

• Message type: E = Error

• Message class: CNV_20800 - Message class for CNV_20800

• Message number: 066

• Message text: &1: hidden field &2 does not contain a value

What causes this issue?

During the conversion &V1& (account groups are given in brackets), the
account group changes. Other than for the old one, the field "&V3&" &V2&
(table key without client is given in brackets) is a hidden field.
However no value has been stored for this field anyway.

Error message extract from SAP system. Copyright SAP SE.

CNV_20800066 - Details

• The SAP error message CNV_20800066 typically occurs during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or other data migration tools. This error indicates that a hidden field (denoted as &2 in the error message) is expected to contain a value, but it is currently empty or not populated.
  
  Cause:
  
  Missing Data: The most common cause is that the source data does not have a value for the specified hidden field. This can happen if the data extraction process did not capture all necessary fields or if the data was not properly formatted.
  Mapping Issues: There may be a mapping issue where the source field is not correctly mapped to the target field in the migration template.
  Configuration Errors: Incorrect configuration settings in the migration tool or the data model can lead to this error.
  Data Validation Rules: The target system may have validation rules that require certain fields to