The address that was right in four places and wrong in one
Each order row stores the customer's name, email and address alongside the order. A customer moved, support updated the address on their most recent order, and the other twelve still show the old one.
There is no single place that says where this customer lives, so there is no update that can be correct.
Give the customer's details one home.
Components — tap one, then tap a slot on the diagram
!A customer moved. Twelve of their thirteen orders still show the old address.
Outside every boundary: orders (name, email, address inline; FAILED: duplicated), Support update, an empty slot for the one row per customer, an empty slot for the how the order points at it Connections: Support update calls one row per customer — one update (step 1) orders calls how the order points at it (step 2) how the order points at it calls one row per customer — references (step 3)
ordersname, email, address inlineduplicated
Support update