How To Fix MM308 - Previous period and last period of previous year have different values

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 308

• Message text: Previous period and last period of previous year have different values

What causes this issue?

You have maintained different accounting data for the previous period
and for the last period of the previous year. However, these periods
are identical since the current period is period 01 of the current
fiscal year.

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 your entries and correct them.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MM308 - Previous period and last period of previous year have different values ?

  The SAP error message MM308, which states "Previous period and last period of previous year have different values," typically occurs in the context of inventory management and material valuation. This error indicates that there is a discrepancy between the inventory values for the previous period and the last period of the previous year. This can happen due to various reasons, such as incorrect postings, adjustments, or changes in valuation methods.
  Causes:
  
  Incorrect Inventory Postings: If there were manual adjustments or incorrect postings made in the inventory, it could lead to discrepancies.
  Changes in Valuation Methods: If the valuation method for materials was changed, it could affect how values are calculated and reported.
  Data Migration Issues: If data was migrated from another system or during an upgrade, inconsistencies may arise.
  Unposted Documents: There may be unposted documents that affect the inventory values for the periods in question.
  Period Closing Issues: If the previous periods were not closed properly, it could lead to inconsistencies in the reported values.
  
  Solutions:
  
  Review Inventory Postings: Check the inventory postings for the periods in question to identify any discrepancies. Use transaction codes like MB51 (Material Document List) to analyze postings.
  Check Valuation Methods: Ensure that the valuation methods used for materials have not changed unexpectedly. You can check this in the material master data.
  Reconcile Inventory Values: Perform a reconciliation of inventory values between the periods. This may involve running reports to compare values and identify differences.
  Post Missing Documents: If there are unposted documents, ensure they are posted correctly to reflect the accurate inventory values.
  Consult with Finance: If the issue persists, consult with the finance team to ensure that all financial postings are correct and that there are no discrepancies in the financial records.
  Use Transaction Code MB5B: This transaction can help you analyze the stock values for the specified periods and identify where the discrepancies lie.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as MB51 (Material Document List), MB5B (Stock on Posting Date), and MMBE (Stock Overview) to analyze inventory data.
  SAP Notes: Check for any SAP Notes related to MM308 for specific patches or updates that may address known issues.
  Documentation: Review SAP documentation or help files for additional insights into inventory management and valuation discrepancies.
  
  If the problem persists after following these steps, it may be necessary to engage SAP support or a consultant with expertise in SAP MM (Materials Management) to conduct a deeper analysis.