How To Fix BE404 - Item &: reservation document item &/& already created

SAP Error Message - Details

• Message type: E = Error

• Message class: BE - General document entry

• Message number: 404

• Message text: Item &: reservation document item &/& already created

What causes this issue?

You cannot reference a reservation item which has already been
flagged as complete.

System Response

Processing stopped.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message BE404 - Item &: reservation document item &/& already created ?

  The SAP error message BE404 indicates that a reservation document item has already been created for the specified item in the system. This typically occurs when there is an attempt to create a reservation for an item that already has an existing reservation.
  Cause:
  
  Duplicate Reservation Attempt: The most common cause is that the user is trying to create a reservation for an item that has already been reserved.
  System Configuration: There may be specific configurations or settings in the system that prevent multiple reservations for the same item.
  User Error: The user may not be aware that a reservation already exists for the item, leading to an attempt to create a duplicate.
  
  Solution:
  
  Check Existing Reservations: Before creating a new reservation, check if there is already a reservation for the item. You can do this by using transaction codes like MB22 (Change Reservation) or MB23 (Display Reservation) to view existing reservations.
  Modify Existing Reservation: If a reservation already exists and needs to be updated, consider modifying the existing reservation instead of creating a new one.
  Delete Unnecessary Reservations: If the existing reservation is no longer needed, you can delete it using transaction code MB22 (Change Reservation) and then delete the reservation.
  Consult with Team: If you are unsure about the existing reservations, consult with your team or the person responsible for inventory management to avoid conflicts.
  
  Related Information:
  
  Transaction Codes:
  
  MB21: Create Reservation
  MB22: Change Reservation
  MB23: Display Reservation
  
  
  Documentation: Refer to SAP Help documentation for more details on managing reservations and understanding the implications of creating or modifying them.
  User Training: Ensure that users are trained on how to check for existing reservations to minimize the occurrence of this error.
  
  By following these steps, you should be able to resolve the BE404 error and manage reservations effectively in SAP.