A split-payment selection changed

Restaurly rejected an old selection so the same quantity is not paid twice.

1. Close the old selection and refresh the checkout preview.
2. Check payment history for a payment recorded on another device.
3. Select only the quantities that remain payable.
4. Keep linked-choice fragments together; an indivisible bundle cannot be separated from its parent quantity.
5. Confirm the new total and submit once.

If two waiters are collecting payment from the same table, coordinate before either continues.