Message type: E = Error
Message class:  CNV_20100 - Messageclass for chart of account conversion 
Message number: 398
Message text: Priority check for duplicate records is active for table &1
In case of duplicate records during the conversion for this table a
priority routine is called to decide which record shall be updated to
the database.
This decision is done based on the mapping entries (Prio flag) in the
following descending priority order:
Priority on account level (B-level)
Priority on account level (A-level)
Priority on chart of accounts level
Information
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.
The SAP error message CNV_20100398 indicates that there is a priority check for duplicate records that is active for a specific table (denoted by &1). This error typically arises during data migration or data transfer processes, particularly when using SAP's data migration tools or during system conversions.
Cause: The error occurs when the system detects that there are duplicate records in the specified table, and the priority check for duplicates is enabled. This is a safeguard to ensure data integrity and prevent issues that may arise from having multiple identical records in the database.
Solution: To resolve this error, you can take the following steps: Identify Duplicate Records: Use SQL queries or SAP transaction codes (like SE16 or SE11) to check for duplicate entries in the specified table. You can group by key fields to find duplicates. Remove or Consolidate Duplicates: Depending on your business requirements, you may need to delete or consolidate duplicate records. Ensure that you
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