How To Fix CNV_DMC_SIN480 - Duplicate record - initial ledger group already exists for this record

CNV_DMC_SIN480 - Overview

• Message type: E = Error

• Message class: CNV_DMC_SIN - Messages for s-innovations migration

• Message number: 480

• Message text: Duplicate record - initial ledger group already exists for this record

What causes this issue?

In migration template exist records with same key field combinations but
with different ledger group. One of those records contains an empty
ledger group. Posting to an empty ledger group will already post to all
ledgers automatically. Posting on specific ledger group at same time
will cause duplicate records.

System Response

Records with specific ledger will be skipped in data migration if same
records with empty ledger group are also provided via migration
template. Doing this, duplicate records in the same ledger won't be
posted.

How to fix this error?

Check related records in migration template:
If you want to post the record automatically into all ledgers just keep
the record with empty ledger group. Delete the records with specific
ledger group.
If you want to post only into specific ledger, delete the record with
the empty ledger group.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

CNV_DMC_SIN480 - Details

• The SAP error message CNV_DMC_SIN480 indicates that there is a duplicate record in the initial ledger group for a specific entry during a data migration or conversion process. This typically occurs when you are trying to load financial data into the system, and the system detects that the same initial ledger group has already been created for the same record.
  
  Cause:
  
  Duplicate Data: The most common cause of this error is that the data being imported contains duplicate entries for the initial ledger group. This can happen if the source data has been incorrectly prepared or if there are multiple records for the same ledger group in the migration files.
  Incorrect Mapping: If the mapping of the source data to the target structure is not done correctly, it may lead to the creation of duplicate records.
  Data Migration Process: During the data migration process, if the same data is processed multiple times without proper