Full prescription edit. Pre-Dispensed prescriptions are updated in place; Dispensed prescriptions require a `reason` and the change is recorded as an amendment. DEA-tracked field changes on a controlled substance are blocked — caller must cancel-and-recreate instead.

Why the original figure was wrong. Required — this is a controlled correction.

Lot to re-dispense from. Empty defaults to the lot the original dispense drew from (lot-tracked items), so the printed label keeps its lot number and expiry.

The replacement dispense's transaction.