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

M3418 - Overview

• 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