How To Fix CNV_20800159 - Participating customers have different VAT registration no. (KNA1-STCEG)

CNV_20800159 - Overview

• Message type: E = Error

• Message class: CNV_20800 - Message class for CNV_20800

• Message number: 159

• Message text: Participating customers have different VAT registration no. (KNA1-STCEG)

Diagnosis
According to the mapping, you want to merge two or more old customer
records into one target customer record. However, not all the old
records have identical master data settings: It was found that old
customer records have different values for <ZK>VAT registration no.</>.
(This is determined by the indicator <ZK>VAT registration no.</>, field
KNA1-STCEG).
This may lead to inconsistencies in some applications related to target
customer data.
System Response
<ZH>Error</>
From a technical perspective, this message can be ignored. This may make
sense in the following cases:
No postings to the respective customer records have been made.
The respective customer records are not used any longer and are meant to
be merged into a dummy record.
Procedure
Analyze the situation, and either change the mapping so that only
customer records with identical master data settings are merged, or
decide to ignore the message because one of the special cases described
above applies.
If you decide to ignore the error even though none of the special cases
described above applies, consider that <ZH>the target customer record
will get the <ZK>VAT registration no.</> of the old customer record for
which priority indicator is set.</> Make sure to evaluate the impact of
this decision - for example regarding potential inconsistencies and
required follow-up activities - <ZH>before</> you continue with the
conversion.

Error message extract from SAP system. Copyright SAP SE.

CNV_20800159 - Details

• The SAP error message CNV_20800159 indicates that there is a discrepancy in the VAT registration numbers (KNA1-STCEG) among participating customers during a data migration or conversion process. This error typically arises in scenarios where multiple customer records are being processed, and the system detects that the VAT registration numbers do not match as expected.
  
  Cause:
  
  
  Different VAT Registration Numbers: The primary cause of this error is that the participating customers have different VAT registration numbers, which may be due to:
  
  Incorrect data entry during the migration process.
  Existing discrepancies in the source data.
  Customers being incorrectly linked or associated in the system.
  
  
  
  Data Mapping Issues: If the data mapping rules are not correctly defined, it can lead to mismatches in the expected VAT registration numbers.
  
  
  
  Configuration Issues: There may be configuration settings in the SAP system that enforce certain rules regarding VAT registration numbers that are not being adhered to.
  
  
  
  Solution:
  
  
  Data Validation: 
  
  Review the source data for the