How To Fix CNV_20800157 - Participating customers have different Posting block (KNA1-SPERR)

CNV_20800157 - Overview

• Message type: E = Error

• Message class: CNV_20800 - Message class for CNV_20800

• Message number: 157

• Message text: Participating customers have different Posting block (KNA1-SPERR)

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>Posting block</>. (This
is determined by the indicator <ZK>Posting block</>, field KNA1-SPERR).
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>Posting block</> 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_20800157 - Details

• The SAP error message CNV_20800157 indicates that there is a discrepancy in the posting block settings for customer master records across different participating customers in a system, specifically related to the field KNA1-SPERR (which represents the posting block indicator for customer master records).
  
  Cause:
  The error typically arises during data migration or integration processes where multiple customer records are being processed. The posting block (SPERR) is a field that can restrict postings to a customer account. If one customer has a posting block set (e.g., it is marked as blocked for postings), while another customer does not, the system will raise this error to prevent inconsistencies in the data.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Customer Master Records:
  
  Use transaction code SE16N or SE11 to view the KNA1 table and check the SPERR field for the relevant customer records.
  Identify which customers have the posting block set and which do not.
  
  
  
  Align