DocsAPITARGETING_KEY_MISMATCH.md
TARGETING_KEY_MISMATCH
- HTTP status
- 409
- Recommended action
- CREATE_NEW_RUN
- Details payload
{ currentTargetingKey: string, attemptedTargetingKey: string, experimentId: string, recommendedAction: RecommendedAction }
Cause
The Targeting Key changed on a Run that is already assigning traffic. Every Entity would rebucket, and the Exposures already recorded would describe a different population than the ones that follow.
Fix
Start a new Run with the new Targeting Key. The old Run keeps its measured cohort intact; the new one buckets from scratch.