How To Fix MM650 - Purchasing data cannot be maintained as material group is lock-relevant

MM650 - Overview

• Message type: E = Error

• Message class: MM - Messages for material master maintenance and Customizing

• Message number: 650

• Message text: Purchasing data cannot be maintained as material group is lock-relevant

What causes this issue?

You have locked the material. Since the field <LS>Material group</> has
been flagged in Customizing for the <LS>Material Master</> as
lock-relevant, this field can no longer be maintained after the
material is locked. As a result, purchasing data can no longer be
created because a material group must be entered in order to create
this data.

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?

If it is absolutely necessary to create purchasing data, unlock the
material and maintain the field <LS>Material group</>. Then relock the
material.
<ZH>Important</>
When a material has been locked and saved, it can be unlocked only with
a special authorization, and only if it is not used in Configuration
Management.

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 MM650 - Purchasing data cannot be maintained as material group is lock-relevant ?

  The SAP error message MM650 indicates that you are trying to maintain purchasing data for a material, but the material group associated with that material is set to be "lock-relevant." This means that the purchasing data cannot be changed because the material group is configured in such a way that it restricts modifications to ensure data integrity.
  
  Cause:
  The primary cause of this error is that the material group for the material you are trying to edit has been set to "lock-relevant." This setting is typically used to prevent changes to purchasing data when certain conditions are met, such as when the material is being processed in a specific way or when it is part of a larger transaction that requires data consistency.
  
  Solution:
  To resolve this issue, you can take the following steps:
  
  
  Check Material Group Settings:
  
  Go to the configuration settings for the material group in question. You can do this by navigating to