How To Fix RY145 - Transaction &1 is already included as an external reference in trans. &2

RY145 - Overview

• Message type: E = Error

• Message class: RY - Messages for RM Basis

• Message number: 145

• Message text: Transaction &1 is already included as an external reference in trans. &2

What causes this issue?

The transaction you have entered as a reference has already been
specified as a reference transaction in another generic transaction. As
a consequence, the transaction may be selected twice.

Error message extract from SAP system. Copyright SAP SE.

RY145 - Details

• The SAP error message RY145 indicates that a transaction (identified by &1) is already included as an external reference in another transaction (identified by &2). This typically occurs in the context of financial transactions, where a document or transaction cannot be referenced multiple times in a way that violates the system's integrity rules.
  
  Cause:
  
  Duplicate Reference: The primary cause of this error is that the same transaction is being referenced more than once in a way that is not allowed by the system. This can happen if you are trying to create a new transaction that references an existing one that is already linked to another transaction.
  Incorrect Data Entry: Users may inadvertently enter the same transaction number in multiple places, leading to conflicts.
  System Configuration: There may be specific configurations or settings in the SAP system that restrict the referencing of transactions.
  
  
  Solution:
  
  Check Transaction References: Review the transactions involved. Ensure that the transaction you