Upsert is not working in ERP cloud adaptor
I am sending invoice from 3rd party system to oracle fusion via oic . I have used upsert operation to create or update the invoice in fusion. but it only creates the invoice . when the same invoice comes tiwce then it is showing error related to duplicate records in oic.
Basially we have created the custom page for invoice using CRM .and we are using fusion custom fileds api to send the invoice data.
How can we do both the operation (post and patch ) during sending the invoice data in fusion?
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