How to fix SAP error RSAR373?

What causes this issue? Incorrect IDoc type &V1& in the ALE definition of the source system.System Response Error when sending data to BW.How to fix this error? Enter IDoc type &V2&.Error message extract from SAP system. Copyright SAP SE.

How To Fix RSAR373 - Incorrect IDoc type &1 in the ALE definition of the source system

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RSAR373 - Overview

Message type: E = Error
Message class: RSAR - Data Transfer and Metadata Maintenance
Message number: 373
Message text: Incorrect IDoc type &1 in the ALE definition of the source system
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What causes this issue?
Incorrect IDoc type &V1& in the ALE definition of the source system.
System Response
Error when sending data to BW.
How to fix this error?
Enter IDoc type &V2&.

Error message extract from SAP system. Copyright SAP SE.

RSAR373 - Details

Error Code: RSAR373
Error Message: Incorrect IDoc type &1 in the ALE definition of the source system

Summary
This error indicates that the IDoc type configured in the ALE (Application Link Enabling) settings for the source system does not match the expected or defined IDoc type. Essentially, the system is trying to send or process an IDoc with a type that is not correctly defined or allowed in the source system's ALE configuration.

Root Causes
Mismatch between the IDoc type used in the sending system and the one defined in the ALE distribution model.
Incorrect or missing partner profile configuration for the source system in transaction WE20.
Transport or configuration inconsistencies where the IDoc type was changed but not updated in the ALE model.
User error during setup of the ALE model or partner profiles, such as selecting the wrong message type or IDoc type.
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