How To Fix COTU003 - This order number has already been assigned

COTU003 - Overview

• Message type: E = Error

• Message class: COTU - Messages for Partial Conversion Planned Order -> Prod. Order

• Message number: 003

• Message text: This order number has already been assigned

What causes this issue?

During partial conversion you selected an order type with external
number assignement for the production orders. You have assigned an
order number that is already used.

How to fix this error?

Check the order number entered for
use for another partial quantity
use in an existing production order

Error message extract from SAP system. Copyright SAP SE.

COTU003 - Details

• The SAP error message COTU003, which states "This order number has already been assigned," typically occurs when there is an attempt to create or process an order that has already been assigned a unique order number in the system. This can happen in various SAP modules, such as SAP Controlling (CO) or SAP Project System (PS).
  Causes:
  
  Duplicate Order Creation: The user may be trying to create a new order with an order number that already exists in the system.
  System Configuration: The system may be configured to prevent the reuse of order numbers, leading to this error when a duplicate is detected.
  Data Migration Issues: If data has been migrated from another system, there may be conflicts with existing order numbers.
  User Error: The user may have mistakenly entered an order number that is already in use.
  
  Solutions:
  
  Check Existing Orders: Verify if the order number you are trying to use already exists in the system.