If a scenario has one or more palette defined on the dropoffStack, the simulator will expect to see them delivered in order the pass the solution. Palettes are identified by SKU, so if you have multiple palettes available with the same SKU you can deliver any of them to meet the criteria.
For example, in the example below, the provided instruction set fails because the pickupStack isn't empty when the simulation finishes. Instead of using the palette at 2.2.1, change the instructions to use the palette on the pickupStack instead.
pickup instruction applies to the pickupStack, whereas the retrieve instruction applies to a cell where a palette has been stored.
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