All key fields (key
) in Optional Field must contain unique values between 1 and 10. The key specified in the error message appears more than once on either the line item (itm
) or the invoice (inv
).
The line item (itm
) Optional Fields (opt
) override duplicate keys (key
) on the invoice (inv
).
{ "err": [ { "code": -2000, "msg": "Key in OptionalFields must be unique - duplicate key [1]." } ]}
Ensure that all key fields (key
) in the Optional Fields (opt
) are unique on the Invoice or the Line Items. The same Optional Field key can be used in multiple Line Items.
For more information, see Optional Fields.