FLX-7004: no prediction was registered at that registration timestamp
Family: calibration (the 7000 band)
fluxsim accuracy record --registered-at T publishes the outcomes-only record for the predictions sealed at T, and for those alone. No prediction under the state directory carries that registered_at, so there is nothing to publish -- and a record written anyway would name a registration window it does not cover. Register the predictions first, or pass the registered_at the predictions actually carry.
Look it up offline
$ fluxsim explain FLX-7004
Every code is listed in the error index.