When processing an order you might come across the "Hard 121286 – [State] is not a valid state for the specified shipment" error.
This message is either shown when the Ship To State is missing, or when shipping to an APO/FPO/DPO, the state is invalid.
Feel free to follow the step-by-step guide written below or the video guide, as you prefer:
To do so:
1. Find the order through any of the possible ways (after Import Orders, Batches, Order History, etc) as it applies to the case
2. Click the edit button of the order you wish to change
3. Correct the state and/or postal code in the order (and change the Country if it's a APO/FPO/DPO case
4. Press Save to apply the changes
If the rest of the order information is correct you will be able to process it.