Hi Sri,
If you want to give retrospective impact then only realignment required otherwise new custom field will serve the purpose.
Malay
Hi Sri,
I do not see why realignment is required here. The COPA characteristic length is always 18 characters so a change from 10 to 12 should not matter. Also the historical data should not be changed because that was the invoice number at that time. The new invoice numbers will be posted with 12 characters.
To understand realignment better refer : https://blogs.sap.com/2011/01/13/realignment-in-co-pa/
regards
Waman
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