How To Fix WW122 - Base material groups are already assigned. Function not possible.

SAP Error Message - Details

• Message type: E = Error

• Message class: WW - Material group master maintenance

• Message number: 122

• Message text: Base material groups are already assigned. Function not possible.

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.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message WW122 - Base material groups are already assigned. Function not possible. ?

  The SAP error message WW122, which states "Base material groups are already assigned. Function not possible," typically occurs in the context of material management or when dealing with material master data. This error indicates that the base material groups you are trying to assign or modify are already linked to other materials or processes, preventing the action you are attempting.
  Cause:
  
  Existing Assignments: The base material groups you are trying to assign are already linked to other materials or have existing assignments in the system.
  Data Integrity Constraints: SAP enforces data integrity rules to prevent duplicate or conflicting assignments, which can lead to this error.
  Configuration Issues: There may be configuration settings in the material management module that restrict changes to certain material groups.
  
  Solution:
  
  
  Check Existing Assignments: 
  
  Use transaction codes like MM03 (Display Material) to check if the base material groups are already assigned to other materials.
  Review the material master records to identify any existing links.
  
  
  
  Remove or Modify Assignments:
  
  If you need to change the assignment, you may need to first remove the existing assignment from the materials that are currently using it.
  Use transaction codes like MM02 (Change Material) to modify the material groups as necessary.
  
  
  
  Consult with Configuration Team:
  
  If you are unsure about the implications of changing material group assignments, consult with your SAP configuration team or a functional consultant to understand the impact on your business processes.
  
  
  
  Review Authorization:
  
  Ensure that you have the necessary authorizations to make changes to material groups. Lack of proper permissions can sometimes lead to errors.
  
  
  
  Check for Customizations:
  
  If your organization has custom developments or enhancements in place, check if they might be affecting the assignment of material groups.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as MM01 (Create Material), MM02 (Change Material), and MM03 (Display Material) for managing material master data.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP Notes can provide additional insights or solutions.
  Documentation: Review SAP documentation or help files related to material management and material groups for a deeper understanding of how they function within the system.
  
  If the issue persists after following these steps, it may be beneficial to reach out to SAP support or your internal IT team for further assistance.