How To Fix ISJP602 - Line item is already included in Monthly Invoice &1 &2

ISJP602 - Overview

• Message type: E = Error

• Message class: ISJP - Message class for invoice summary

• Message number: 602

• Message text: Line item is already included in Monthly Invoice &1 &2

What causes this issue?

You are trying to save changes in an accounting document which is
already included in Monthly Invoice &v1&

System Response

It is possible to save the changes of the baseline date or due date
depending on the settings in the IMG activity
<DS:SIMG.SIMG_CFORFBOBA5BELE>Change Message Control for Document
Processing</>.
Other changes different from baseline date or due date are not allowed.

How to fix this error?

Cancel the monthly invoice before you save the changes again.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message ISJP602 - Line item is already included in Monthly Invoice &1 &2 ?

  The SAP error message ISJP602, which states "Line item is already included in Monthly Invoice &1 &2," typically occurs in the context of invoicing within the SAP system, particularly when dealing with monthly billing processes. This error indicates that the line item you are trying to include in a monthly invoice has already been processed and included in a previous invoice.
  
  Cause:
  
  Duplicate Processing: The line item has already been invoiced in a previous monthly invoice, and the system prevents it from being included again to avoid duplicate billing.
  Incorrect Invoice Selection: The user may be attempting to select an invoice that has already been finalized or posted.
  Data Entry Errors: There may be a mistake in the data entry process, leading to an attempt to re-invoice the same item.
  
  
  Solution:
  
  Check Previous Invoices: Review the previous monthly invoices to confirm whether the line item has already been included. You can do this by checking the