`customer_match_ambiguous`

HTTP 409 · Do not retry unchanged — fix the request first

More than one customer in Meykt matches the input, so it is unclear which one you mean.

What happened

Customers are matched in this order: external_reference, then code, then email. Either the email in your request belongs to several customers, or your external_reference is stored on more than one. Meykt never guesses which one to update.

How to fix it

Send code (the customer number in Meykt) — it is unique, so exactly one customer is meant. If the email is the ambiguous part, your own external_reference works as well, as long as it is stored on only one customer.
Repeat the request with the clarified input. Nothing was written.

Retrying

Repeating the request unchanged will fail again. Correct the request first — the response tells you which part is wrong.

All error codes: /developers/errors · Machine-readable: llms-full.txt