RESOURCE_CONFLICT

The resource was modified or already exists.

HTTP status: 409. Retrying the same request returns the same error.

What to do

Fetch the latest version, reapply your change, and send it with the new version in the If-Match header.

Hint returned with the error: Fetch the resource again and retry with its current version.

Why it happens

  • Someone else updated the event after you read it (If-Match did not match)
  • An attempt to create a resource that already exists

Endpoints that return it