How To Fix M3418 - Serial numbers already assigned to this material

SAP Error Message - Details

• Message type: E = Error

• Message class: M3 - Material Master

• Message number: 418

• Message text: Serial numbers already assigned to this material

What causes this issue?

You have changed the serial number profile although serial numbers have
already been assigned to the material. This may have the following
consequences:
The serial numbers already assigned may no longer be consonant with the
current serial number profile.
The stock check requirement may have changed.

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 the serial numbers.
Check whether the stock check requirement has changed. If it has, you
can execute program <DS:RE.RISERNR9>RISERNR9</> to copy the profile
settings for the stock check to the serial number. However, run this
program only after the material master changes have been posted
successfully. Enter the following information as parameters:
New serial number profile
Material number

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message M3418 - Serial numbers already assigned to this material ?

  The SAP error message M3418, "Serial numbers already assigned to this material," typically occurs when you attempt to perform an operation (such as goods movement, delivery, or sales order processing) involving a material that has already been assigned serial numbers, but the system detects that the serial numbers you are trying to assign are already in use or have been assigned to another transaction.
  Causes:
  
  Duplicate Serial Numbers: The serial numbers you are trying to assign to the material are already assigned to another document or transaction.
  Incorrect Serial Number Management: The serial number management settings for the material may not be configured correctly, leading to conflicts.
  System Configuration Issues: There may be issues with the configuration of the serial number management in the material master or the related settings in the SAP system.
  Data Entry Errors: Manual entry errors when inputting serial numbers can lead to this issue.
  
  Solutions:
  
  
  Check Serial Number Assignment:
  
  Use transaction code IQ03 (Display Serial Number) to check the status of the serial numbers you are trying to assign. Ensure they are not already assigned to another material or transaction.
  
  
  
  Verify Material Master Settings:
  
  Check the material master record (transaction code MM03) to ensure that the serial number management settings are correctly configured for the material in question.
  Ensure that the material is set to manage serial numbers if that is required for your business process.
  
  
  
  Correct Serial Number Input:
  
  Double-check the serial numbers you are entering to ensure they are correct and not duplicates.
  If you are using a batch input or interface, ensure that the data being passed is accurate.
  
  
  
  Consult with Your Team:
  
  If you are unsure about the status of the serial numbers, consult with your inventory management or warehouse team to clarify the current assignments and usage of the serial numbers.
  
  
  
  SAP Notes and Support:
  
  If the issue persists, check for any relevant SAP Notes that may address this specific error. You can search the SAP Support Portal for updates or patches that may resolve the issue.
  If necessary, contact SAP support for further assistance.
  
  
  
  Related Information:
  
  Serial Number Management: Understand how serial number management works in SAP, including the configuration settings in the material master and the implications for inventory management.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as:
  
  IQ01: Create Serial Number
  IQ02: Change Serial Number
  IQ03: Display Serial Number
  MM03: Display Material Master
  
  
  Documentation: Review SAP documentation or user manuals related to serial number management for best practices and troubleshooting steps.
  
  By following these steps, you should be able to identify the cause of the M3418 error and implement a solution to resolve it.