How To Fix /SAPAPO/SDP121 - Changes were reset.

/SAPAPO/SDP121 - Overview

• Message type: E = Error

• Message class: /SAPAPO/SDP -

• Message number: 121

• Message text: Changes were 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.

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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/SAPAPO/SDP121 - Details

• The SAP error message /SAPAPO/SDP121 Changes were reset typically occurs in the context of SAP Advanced Planning and Optimization (APO), particularly when working with the Supply Network Planning (SNP) or Demand Planning (DP) modules. This error indicates that changes made to a planning object (like a planning book or a key figure) were not saved or were reverted due to some issue.
  Causes:
  
  Data Conflicts: There may be conflicts between the data being processed and the existing data in the system. This can happen if multiple users are trying to make changes simultaneously.
  Locking Issues: If the planning object is locked by another user or process, your changes may not be allowed, leading to a reset of your changes.
  Inconsistent Data: If the data being processed is inconsistent or does not meet the required criteria, the system may reset the changes.
  User Authorizations: Lack of proper authorizations for the user trying to make the changes