[Koha] Mark a batch of items as missing?

After doing some inventory in our library, I obtained a list of the barcodes of a few dozen lost items. Now I'd like use the batch item modification tool to change the "lost status" for that set of items. But I don't see a way to do that with this tool. Is there another way? I'd like to avoid having to mark the items as missing one by one. I'll resort to SQL if necessary. Thanks in advance!