campaign_target_immutable

HTTP 409§9.5 Campaigns, scrubbing, consent, and DNC

A campaign's target cannot be changed: the scrub run authorizing the launch covers one contact list. Targeting another means a new campaign.

Problem shape

Every non-2xx response is an RFC 9457 application/problem+json body. The type URI below is stable and machine-matchable, so branch on the final path segment (the code) and treat the status as redundant confirmation. See the error-handling guide.

{
  "type": "https://docs.vocapable.com/errors/campaign_target_immutable",
  "title": "…",
  "status": 409,
  "detail": "…",
  "instance": "/v1/…"
}

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