Mutation op is not an ARTF Operation value

artf.mutation.op_unknownerrorARTF mutation set

The operation is outside the enum, so the orchestrator cannot tell whether to add, replace, or remove at the target path.

What it means

op carries a value outside OPERATION_ADD, OPERATION_REMOVE, and OPERATION_REPLACE, and is not one of the document's lowercase spellings either.

Why it matters

The path says where and the payload says what; the operation says which of three quite different things to do with it. Guessing between adding a deal and replacing the deal list is not a guess an orchestrator can safely make.

How to fix it

Send an enum value name or its number.

Example that trips it

{ "intent": "ACTIVATE_DEALS", "op": "OPERATION_UPSERT", "path": "/imp/imp-1", "ids": { "id": ["deal-2"] } }

Check your payload

Paste a bid request or response into the tester to see whether this code fires against it, or gate on the id in CI with the CLI: the id is stable, wording is not.

Back to the full diagnostic code reference.