Document of Record REST API getting error out

Summary:

Hi Experts , we are using REST API to upload document of records using REST API with OIC. As we checked integration is erroring out with Error -

The document code must be unique for a combination of person and document type. (PER-1531637)

Content (required):

API name - hcmRestApi/resources/11.13.18.05/documentRecords

Pls note that even after erroring out , DOR is getting created in fusion successfully. Now Question arises why it's erroring out even if we are providing unique combination.

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Code Snippet (add any code snippets that support your topic, if applicable):