How To Fix IB_DECO154 - Serial number &1 for material &2 is already assigned to installed base &3

SAP Error Message - Details

• Message type: E = Error

• Message class: IB_DECO - IB: Messages for IBase

• Message number: 154

• Message text: Serial number &1 for material &2 is already assigned to installed base &3

What causes this issue?

When you create or change an as-built configuration, a material number
or serial number should be assigned to another installed base. The
serial number for the material is already assigned to an existing
installed base and it is not the topmost object in the installed base.

System Response

It is not possible to reassign the serial number; the system cancels
processing.

How to fix this error?

<ZU>You have two options:</>
Cancel the goods issue for the reservation for material &V2& with serial
number &V1& and then re-post goods issue for this reservation using an
available serial number.
Now the material with the new serial number can be used and saved in the
as-built configuration.
<ZU>or</>
If the given material number or serial number should no longer be
assigned to the installed base, use transaction IB52 to remove it from
installed base &V3&.
Restart the transaction.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message IB_DECO154 - Serial number &1 for material &2 is already assigned to installed base &3 ?

  The SAP error message IB_DECO154 indicates that a specific serial number for a material is already assigned to an installed base. This typically occurs in the context of SAP's Installed Base (IB) management, where serial numbers are used to track individual items or components.
  Cause:
  The error arises when you attempt to assign a serial number to an installed base that is already linked to another installed base. This can happen due to:
  
  Duplicate Assignment: The serial number has already been assigned to a different installed base.
  Incorrect Data Entry: There may be a mistake in the data entry process, leading to an attempt to assign a serial number that is already in use.
  System Configuration Issues: There may be issues with the configuration of the installed base management in SAP.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Existing Assignments:
  
  Use transaction codes like IE03 (Display Equipment) or IB01 (Create Installed Base) to check the current assignments of the serial number in question.
  Verify if the serial number is indeed assigned to another installed base.
  
  
  
  Correct the Assignment:
  
  If the serial number is incorrectly assigned, you may need to unassign it from the current installed base using transaction IB02 (Change Installed Base) or similar transactions.
  If the serial number should be assigned to the new installed base, ensure that it is not in use elsewhere.
  
  
  
  Data Validation:
  
  Ensure that the data being entered is correct and that you are not trying to assign a serial number that is already in use.
  Validate the material number and installed base details to ensure they are correct.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or help files related to Installed Base Management for further insights on handling serial numbers and installed bases.
  
  
  
  Contact Support:
  
  If the issue persists and you cannot determine the cause, consider reaching out to your SAP support team or consulting with an SAP expert for further assistance.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as IE03, IB01, IB02, and IB03 for managing installed bases and equipment.
  SAP Notes: Check SAP Notes for any known issues or patches related to installed base management and serial number assignments.
  User Roles and Permissions: Ensure that you have the necessary permissions to make changes to installed bases and serial number assignments.
  
  By following these steps, you should be able to identify the cause of the error and take appropriate action to resolve it.