Wow, what a mess. At the very least (which is about all that could be done) A could assign a new-record-ID to each record; I could tell F where to find it; F co

Wow, what a mess. At the very least (which is about all that could be done) A could assign a new-record-ID to each record; I could tell F where to find it; F could verify its presence (or scream) and tell A.