If orders were canceled in AliExpress, you'll need to place that order in AliExpress again. Sometimes Aliexpress does this due to security concerns. To correct this, you will need to delete the Order ID from the Dropified Orders page as seen below.

From the Orders page, you can click on the Order ID #, click "Delete Order ID", and then confirm.

Once the Order ID is deleted in Dropified, you can place the order again as usual.

You can find canceled AliExpress Order IDs from Dropified with the "Supplier Status" filter on the Tracking page

To detect those orders correctly, you need to do manual sync first.

Then you can select those order IDs and bulk delete them.