external_id_exists
HTTP 409 · type state_error
When
A create with an external_id already used. The error carries the existing id.
Fix
Read or update that record.
Where it comes from
POST /v1/accounts: Create an accountPATCH /v1/accounts/{id}: Update an accountPOST /v1/contacts: Create a contactPATCH /v1/contacts/{id}: Update a contactPOST /v1/invoices: Create an invoicePATCH /v1/invoices/{id}: Update an invoice