Message type: E = Error
Message class:  EK - IS-U Accounts Receivable and Payable 
Message number: 503
Message text: You cannot reverse documents with origin &1
The existing industry-specific instance of event 0070 prevents the
reversal of reversal documents for documents that were created using the
<DS:REPO.REKKBOL0>REKKBOL0</> report to pay over Bollo postings.
This type of reversal has to be prevented, as the DFKKBOL table (Bollo:
Italy) can no longer be updated at this point. It can only be updated
using the REKKBOL0 report (Bollo report, pay over Bollo charges)
directly.
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
If you want to post a document for paying over Bollo charges again, you
have to execute the <DS:REPO.REKKBOL0>REKKBOL0</> report.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message EK503, which states "You cannot reverse documents with origin &1," typically occurs when you attempt to reverse a document that is not eligible for reversal due to its origin or status. The "origin" refers to the source of the document, such as whether it is a purchase order, invoice, or another type of document. Causes: Document Type Restrictions: Certain document types may not allow reversals. For example, some financial documents or documents related to specific processes may have restrictions. Status of the Document: The document may already be in a status that does not permit reversal, such as being fully settled or archived. Origin of the Document: The document may originate from a process that does not support reversal, such as certain types of intercompany transactions or documents created through specific transactions. Configuration Settings: The system configuration may restrict reversals for certain document types or origins. Solutions: Check Document Type: Verify the type
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