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

IB_DECO154 - Overview

• 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.

IB_DECO154 - Details

• 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