How To Fix CNV_20900188 - Participating vendors have different Posting block (LFB1-SPERR)

CNV_20900188 - Overview

• Message type: E = Error

• Message class: CNV_20900 - Message class for package CNV_20900

• Message number: 188

• Message text: Participating vendors have different Posting block (LFB1-SPERR)

Diagnosis
According to the mapping, you want to merge two or more old vendor
records into one target vendor record. However, not all the old records
have identical master data settings: It was found that old vendor
records have different Posting block for company code. (This setting is
determined by the indicator 'Posting block for company code',<ZH>
</>field <ZH>LFB1-SPERR)</>.
This may lead to inconsistencies in some applications related to target
vendor 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 vendor records have been made.
The respective vendor 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 vendor
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 vendor record will
get the Posting block for company code of the old vendor record for
which the 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_20900188 - Details

• The SAP error message CNV_20900188 indicates that there is a discrepancy in the posting block settings for participating vendors in the system. Specifically, the error arises when the vendors involved in a transaction have different posting block statuses, which can prevent the transaction from being processed correctly.
  
  Cause:
  The error is typically caused by the following factors:
  
  Different Posting Block Settings: The participating vendors have different values in the LFB1-SPERR field, which indicates their posting block status. This can happen if one vendor is blocked for posting while the other is not.
  Data Migration Issues: If you are migrating data from one system to another (e.g., during an SAP S/4HANA migration), inconsistencies in vendor master data can lead to this error.
  Manual Changes: Changes made to vendor master data after the initial setup can lead to discrepancies.
  
  
  Solution:
  To resolve the error, you can take the following steps:
  
  
  Check Vendor Master Data:
  
  Go to the vendor master data (transaction