How To Fix WS321 - Multiple update of "actual" data may occur (see long text)

SAP Error Message - Details

• Message type: E = Error

• Message class: WS - Supplier Billing Document

• Message number: 321

• Message text: Multiple update of "actual" data may occur (see long text)

What causes this issue?

Version '000' contains the statistical data from the current update.
This will be changed when you run the report.

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?

Check whether you really want to change the actual data of version
'000' and whether the data on the selection screen is correct.
You must first delete the old data in version '000', otherwise the
statistical data may be updated several times.
Before you delete the data of version '000', you should save the data.
SAP recommend the following procedure:
First perform the recompilation with a version number that starts with
'&( '. You can enter any character as the third character.
Copy the data resulting from the recompilation to version '000' using
the relevant report or the copy management tool of the Logistics
Information System.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message WS321 - Multiple update of "actual" data may occur (see long text) ?

  The SAP error message WS321: Multiple update of "actual" data may occur (see long text) typically occurs during update processing in SAP when the system detects a potential issue that could lead to inconsistent or multiple updates of actual data in the database.
  
  Cause
  
  The message WS321 is a warning that appears during the update task processing.
  It indicates that the same "actual" data (e.g., actual cost, actual quantity, or actual values in controlling or logistics modules) might be updated multiple times within the same LUW (Logical Unit of Work).
  This can happen if multiple update function modules or update tasks try to update the same data simultaneously or in an inconsistent sequence.
  The root cause is often related to:
  
  Incorrect or redundant update calls in custom code or user exits.
  Parallel update tasks that are not properly synchronized.
  Inconsistent or incorrect design of update function modules.
  Multiple commits or nested updates that cause the same data to be updated more than once.
  
  
  
  
  Solution
  
  
  Check the Long Text of the Message:
  
  The long text usually provides more details about which data or update function module is involved.
  Use transaction SM13 (Update Requests) to analyze the update records and identify the problematic update function modules.
  
  
  
  Analyze Update Function Modules:
  
  Identify which update function modules are causing multiple updates.
  Check if the update function modules are called multiple times unnecessarily.
  Review custom code, user exits, BAdIs, or enhancements that might be triggering multiple updates.
  
  
  
  Correct the Update Logic:
  
  Ensure that update function modules are called only once per LUW.
  Avoid nested commits or multiple commits within the same LUW.
  Synchronize parallel update tasks if applicable.
  
  
  
  Check for SAP Notes:
  
  Search for SAP Notes related to WS321 and your specific module or scenario.
  SAP Notes may provide patches or corrections if this is a known issue.
  
  
  
  Testing:
  
  After corrections, test the update process thoroughly to ensure that the multiple update warning no longer appears.
  Monitor update requests in SM13 for errors or warnings.
  
  
  
  
  Related Information
  
  Transaction SM13: To monitor and analyze update requests and errors.
  Update Function Modules: These are special function modules that run in the update task and perform database updates.
  LUW (Logical Unit of Work): A sequence of database operations that are committed or rolled back as a single unit.
  SAP Notes: Use SAP ONE Support Launchpad to search for notes related to WS321.
  Common Modules Affected: Controlling (CO), Materials Management (MM), Production Planning (PP), and other modules where actual data updates are critical.
  
  
  Summary
  
  
  
  Aspect
  Description
  
  
  
  
  Cause
  Multiple update calls to the same actual data within one LUW, causing potential data conflicts.
  
  
  Solution
  Analyze update function modules, correct redundant calls, avoid nested commits, check SM13, apply SAP Notes.
  
  
  Tools
  SM13 (Update Requests), SE37 (Function Module), SAP Notes, Debugger.
  
  
  Related Areas
  Controlling, Logistics, Custom Enhancements, Update Task Processing.
  
  
  
  
  If you provide the exact context or module where this error occurs, I can help you with more specific guidance or SAP Notes references.