How To Fix CNV_20800166 - Participating customers have different Dunning procedure (KNB5-MAHNA)

CNV_20800166 - Overview

• Message type: E = Error

• Message class: CNV_20800 - Message class for CNV_20800

• Message number: 166

• Message text: Participating customers have different Dunning procedure (KNB5-MAHNA)

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>Dunning procedure</>.
(This is determined by the indicator <ZK>Dunning procedure</>, field
KNB5-MAHNA).
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>Dunning procedure</> 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_20800166 - Details

• The SAP error message CNV_20800166 indicates that there is a discrepancy in the dunning procedures assigned to participating customers during a data migration or conversion process. Specifically, the error arises when the system detects that the customers involved have different dunning procedures defined in the customer master data (table KNB5, field MAHNA).
  
  Cause:
  The primary cause of this error is that the customers being processed have different dunning procedures assigned to them. Dunning procedures are used to manage the collection of overdue payments, and each customer can have a different procedure based on their payment history, creditworthiness, or other criteria. When the system attempts to process these customers together, it requires that they share the same dunning procedure to ensure consistency in the dunning process.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Identify the Customers: Determine which customers are causing the issue. You may need to check the logs or the