How To Fix M7677 - Reservation & already exists

M7677 - Overview

• Message type: E = Error

• Message class: M7 - Inventory Management and Physical Inventory

• Message number: 677

• Message text: Reservation & already exists

What causes this issue?

The externally-assigned reservation number already exists in the
database.

System Response

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

How to fix this error?

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 M7677 - Reservation & already exists ?

  The SAP error message M7677 ("Reservation & already exists") typically occurs when you attempt to create a reservation for a material that already has an existing reservation in the system. This can happen in various scenarios, such as when trying to reserve stock for a production order, sales order, or any other purpose.
  
  Cause:
  
  Duplicate Reservation: The most common cause is that a reservation for the same material and quantity already exists in the system.
  Incorrect Input: You may be trying to create a reservation with the same reference number or for the same material and plant combination that is already reserved.
  System Configuration: There may be specific configurations or settings in the system that prevent the creation of multiple reservations for the same item.
  
  
  Solution:
  
  
  Check Existing Reservations: 
  
  Use transaction code MB22 (Change Reservation) or MB23 (Display Reservation) to check if a reservation already exists for the material in question.
  If a reservation exists, you can