How To Fix EK260 - Subtransaction &1 already allocated to int. budget billing subtrans. &2

EK260 - Overview

• Message type: E = Error

• Message class: EK - IS-U Accounts Receivable and Payable

• Message number: 260

• Message text: Subtransaction &1 already allocated to int. budget billing subtrans. &2

What causes this issue?

You have attempted to maintain a sub-transaction in the account
determination for the budget billing plan extrapolation. This sub-
transaction is already allocated to an internal sub-transaction in the
context of budget billing plan processing.
This is not permissible.

System Response

The system cannot continue processing.

How to fix this error?

You must use sub-transactions for account determination that are
intended for the budget billing main transaction (
<DS:SIMG._ISUFICABFDP_000010>Maintain Transactions for Budget Billing
</>).
These transactions may not already be allocated to one of the internal
sub-transactions for the budget billing main transaction (
<DS:SIMG._ISUFICABFDP_000010>Maintain Transactions for Budget Billing
</>).

Error message extract from SAP system. Copyright SAP SE.

EK260 - Details

• The SAP error message EK260 indicates that a subtransaction (identified by &1) has already been allocated to an internal budget billing subtransaction (identified by &2). This typically occurs in the context of budget management and billing processes within SAP, particularly in modules related to financial accounting or controlling.
  
  Cause:
  
  
  Duplicate Allocation: The error usually arises when there is an attempt to allocate a subtransaction that has already been assigned to another budget billing subtransaction. This can happen due to:
  
  Incorrect data entry or configuration.
  A process that attempts to allocate the same subtransaction multiple times.
  A system or user error where the same transaction is processed again.
  
  
  
  
  Configuration Issues: There may be issues with the configuration of budget billing or subtransaction settings in the system.
  
  
  
  Solution:
  
  
  Check Allocations: Review the allocations of the subtransaction in question. Ensure that it is not already assigned to another budget billing subtransaction. You can do this by:
  
  Navigating to the relevant transaction or