How To Fix MG156 - The purchasing group cannot be reset

SAP Error Message - Details

• Message type: E = Error

• Message class: MG - Batch input: material master

• Message number: 156

• Message text: The purchasing group cannot be reset

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message MG156 - The purchasing group cannot be reset ?

  The SAP error message MG156, which states "The purchasing group cannot be reset," typically occurs in the context of material management and purchasing processes. This error indicates that there is an issue with the purchasing group assignment for a material or vendor, and it cannot be reset due to certain constraints or conditions.
  Causes:
  
  Existing Purchase Orders: If there are existing purchase orders or contracts associated with the purchasing group, the system will not allow you to reset it.
  Material Master Data: The purchasing group may be linked to specific material master records that are currently in use.
  Vendor Master Data: Similar to material master data, if the purchasing group is linked to vendor records that are active, it cannot be reset.
  Authorization Issues: Sometimes, the user may not have the necessary authorizations to make changes to the purchasing group.
  System Configuration: There may be configuration settings in the system that prevent changes to the purchasing group under certain conditions.
  
  Solutions:
  
  Check Existing Purchase Orders: Review any existing purchase orders or contracts that are associated with the purchasing group. If they exist, you may need to close or delete them before attempting to reset the purchasing group.
  Review Material and Vendor Master Data: Check the material and vendor master records to see if they are linked to the purchasing group. If they are, you may need to change or delete those links.
  User Authorizations: Ensure that you have the necessary authorizations to make changes to the purchasing group. If not, contact your system administrator to obtain the required permissions.
  Consult Configuration Settings: If you suspect that system configuration is causing the issue, consult with your SAP Basis or configuration team to review the settings related to purchasing groups.
  Use Transaction Codes: You can use transaction codes like ME51N (Create Purchase Requisition) or ME21N (Create Purchase Order) to check for any dependencies related to the purchasing group.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as ME51N, ME21N, ME31K (for contracts), and ME41 (for requests for quotation).
  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 purchasing groups and material management for more detailed information on how purchasing groups function within the system.
  
  If the issue persists after trying the above solutions, it may be beneficial to consult with your SAP support team or a professional with expertise in SAP MM (Materials Management) for further assistance.