Message type: E = Error
Message class: /SAPAPO/SDP -
Message number: 121
Message text: Changes were reset.
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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
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