If you need to place an order again you’ll need to delete the existing Ali Order ID:
How do I do this in bulk?
You can find cancelled AliExpress Order ID’s from Dropified using the ‘Aliexpress Status’ filter on your Tracking page in Dropified:
To detect those orders correctly, you need to do a manual sync first: http://files.dropified.com/233N2Z2l0C22
Then you can select those order IDs and bulk delete them:
Once the Order ID's are deleted you'll be able to place the orders again.