How To Fix CNV_MBT881 - Double entry. Enter a different number (no.).

CNV_MBT881 - Overview

• Message type: E = Error

• Message class: CNV_MBT - PCL message class

• Message number: 881

• Message text: Double entry. Enter a different number (no.).

What causes this issue?

The program has detected entries with the same values in the columns
'Global Parameter Name', 'Client' and 'No.'. If you want to create a
Global Parameter with different values create an entry for each
different value and count the entries in the column 'No.'.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

To remove the error enumerate the same Global Parameters in the field
'No.'.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

CNV_MBT881 - Details

• The SAP error message CNV_MBT881 ("Double entry. Enter a different number (no.)") typically occurs during data migration or data transfer processes, particularly when using the SAP Migration Tool or during the execution of a migration project. This error indicates that there is a duplicate entry in the data being processed, which violates the uniqueness constraint of the field in question.
  
  Cause:
  
  Duplicate Data: The most common cause of this error is that the data being imported or migrated contains duplicate entries for a field that requires unique values (e.g., primary keys, document numbers).
  Incorrect Mapping: If the mapping of fields from the source system to the target system is incorrect, it may lead to duplicates being created.
  Data Preparation Issues: The data preparation phase may not have adequately handled duplicates, leading to multiple entries for the same identifier.
  
  
  Solution:
  
  Identify Duplicates: Review the data being imported to identify any duplicate entries. This can often be done