How To Fix GHO_BO040 - Entry not possible; medium '&1' is already assigned to production network

GHO_BO040 - Overview

• Message type: E = Error

• Message class: GHO_BO -

• Message number: 040

• Message text: Entry not possible; medium '&1' is already assigned to production network

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message GHO_BO040 - Entry not possible; medium '&1' is already assigned to production network ?

  The SAP error message GHO_BO040 indicates that a specific medium (like a material, resource, or equipment) is already assigned to a production network, and therefore, it cannot be assigned again to another production network or operation. This is a common issue in production planning and execution within SAP systems, particularly in the context of production orders and networks.
  
  Cause:
  
  Duplicate Assignment: The medium you are trying to assign is already linked to another production network or operation.
  
  Configuration Issues: There may be configuration settings in the system that prevent the reassignment of mediums.
  Data Integrity: The system is designed to maintain data integrity, ensuring that resources are not over-allocated or mismanaged.
  
  
  Solution:
  
  
  Check Current Assignments: 
  
  Use transaction codes like CNO1 (for network overview) or CNO2 (for network change) to check where the medium is currently assigned.
  Identify the production network that is currently using the medium.
  
  
  
  Reassign or Release the Medium:
  
  If the medium is no longer needed in