FLX-8002: the fidelity record is malformed or its signature does not verify
Family: evidence/pack (the 8000 band)
SEAM-FIDELITY-SPEC §6 fixes the record's shape and signs it with the verifier key. A record whose fields are missing or mistyped, whose scope statement is not the generated one, or whose signature does not verify against the named key, is refused: an unreadable record is not a weaker record, it is no record.
Look it up offline
$ fluxsim explain FLX-8002
Every code is listed in the error index.