How To Fix MW291 - AR &2 already exists for &1

SAP Error Message - Details

• Message type: E = Error

• Message class: MW - Messages IS-R / Allocation Tables

• Message number: 291

• Message text: AR &2 already exists for &1

What causes this issue?

An allocation rule already exists that is the same as the one you
entered in at least some of the following aspects:
Material / material group
Valid-from date
Quota category
Plant group
Key figure category

System Response

The system cancels the generation of a further allocation rule.

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.

Smart SAP Assistant

• What is the cause and solution for SAP error message MW291 - AR &2 already exists for &1 ?

  The SAP error message MW291 "AR &2 already exists for &1" typically occurs in the context of inventory management or material master data. This error indicates that there is an attempt to create or modify an entry (like a material or storage location) that already exists in the system.
  
  Cause:
  
  Duplicate Entry: The most common cause of this error is that the system is trying to create a record (like a material or storage location) that already exists in the database.
  Incorrect Data Entry: There may be a mistake in the data being entered, such as a typo in the material number or storage location.
  Data Migration Issues: If data has been migrated from another system, there may be duplicates that were not properly handled.
  
  
  Solution:
  
  Check Existing Records: Verify if the record you are trying to create already exists. You can do this by searching for the material number or storage location in the relevant