How To Fix CNV_IUUC_REPLICATION413 - Cannot load or replicate table &1 (key field issue); see long text

CNV_IUUC_REPLICATION413 - Overview

• Message type: E = Error

• Message class: CNV_IUUC_REPLICATION - IUUC replication messages (HANA)

• Message number: 413

• Message text: Cannot load or replicate table &1 (key field issue); see long text

What causes this issue?

SAP LT Replication Server cannot perform an initial load for the table,
or replicate data for the table as there is an issue with the key fields
of the table. In order to perform an initial load<(>,<)> or to replicate
data, the following restrictions apply:
The table must have a primary key
The table cannot have any key fields that are defined as nullable.
The table cannot have more than 16 primary key fields.

System Response

SAP LT Replication Server cannot perform an initial load for the table,
or replicate data for the table.

How to fix this error?

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

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

CNV_IUUC_REPLICATION413 - Details

• The SAP error message CNV_IUUC_REPLICATION413 indicates that there is an issue with loading or replicating a table due to a problem with the key fields. This error typically arises in the context of SAP Landscape Transformation (SLT) replication, where data is being replicated from a source system to a target system.
  
  Cause:
  The error can be caused by several factors, including:
  
  Missing Key Fields: The key fields required for the replication of the specified table are not defined or are missing in the source or target system.
  Data Type Mismatch: There may be a mismatch in the data types of the key fields between the source and target systems.
  Incorrect Configuration: The configuration settings for the replication might not be set up correctly, leading to issues in identifying the key fields.
  Table Structure Changes: If the structure of the table has changed (e.g., fields added or removed) after the initial configuration, it may lead to replication