How To Fix IV004 - Create 'unique indexes' on the target tables

IV004 - Overview

• Message type: E = Error

• Message class: IV - Elementary Steps of Incremental Conversion (ICNV)

• Message number: 004

• Message text: Create 'unique indexes' on the target tables

A unique index ensures that the values of the index fields are unique.
If a target table has fewer or shorter fields than the source table or
if several source data records are mapped to the same target data
record when the data is mapped, these indexes ensure that only such a
data record is inserted.
It is better for the conversion speed if the target tables have as few
indexes as possible, since the indexes also have to be updated for each
insert or update operation. Therefore only the unique indexes are
created on the target table.

Error message extract from SAP system. Copyright SAP SE.

IV004 - Details

• The SAP error message IV004, which states "Create 'unique indexes' on the target tables," typically occurs during data transfer or data processing operations in SAP systems, particularly when dealing with inventory management or logistics data. This error indicates that the system has detected a violation of uniqueness constraints on the target tables, meaning that the data being inserted or updated would result in duplicate entries where unique indexes are expected.
  
  Cause:
  
  Duplicate Data: The most common cause of this error is the presence of duplicate records in the source data that are being transferred to the target tables.
  Missing Unique Indexes: The target tables may not have the necessary unique indexes defined, which are required to enforce data integrity.
  Data Model Issues: There may be issues with the data model or configuration that lead to conflicts in data uniqueness.
  Incorrect Data Mapping: The mapping of fields from the source to the target may not be