How To Fix NRSCNV353 - Only 1:1 mapping with replaced char. is allowed when modifiyng key fields

NRSCNV353 - Overview

• Message type: E = Error

• Message class: NRSCNV - Message class

• Message number: 353

• Message text: Only 1:1 mapping with replaced char. is allowed when modifiyng key fields

What causes this issue?

You are trying to replace a key field.

System Response

This is not possible. Make sure that the following requirements are met:
The data type and length of the characteristic replacing the previous
characteristic must match
The only filling method allowed is 1:1 mapping with previous
characteristic

How to fix this error?

If one of these requirements is not met, adjust the operation
accordingly or select another characteristic as a replacement.

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.

Smart SAP Assistant

• What is the cause and solution for SAP error message NRSCNV353 - Only 1:1 mapping with replaced char. is allowed when modifiyng key fields ?

  The SAP error message NRSCNV353 indicates that there is an issue with the mapping of key fields during a data conversion or migration process. This error typically arises when you are trying to modify key fields in a way that does not adhere to the 1:1 mapping requirement, particularly when using replaced characters.
  
  Cause:
  
  1:1 Mapping Requirement: The error suggests that the system expects a one-to-one mapping for the key fields being modified. This means that each original key value must correspond to exactly one new key value.
  Replaced Characters: If you are using replaced characters (e.g., special characters or placeholders) in the key fields, the system may not be able to establish a clear mapping, leading to this error.
  Data Integrity Issues: There may be issues with the integrity of the data being migrated or converted, such as duplicates or missing values that violate the mapping rules.
  
  
  Solution:
  
  Review Key Field Modifications: Ensure that any