Duplicate imports
I've discovered that upon importing manuscripts multiple times using the "Refresh" button (Colab instance), we get multiple copies of some manuscripts. That is, the same preprints are imported but given new manuscript IDs. We are supposed to have measures in the system to prevent this: firstly, we record the date range of our request and avoid that date range for subsequent requests; secondly, we do a search for existing manuscripts with the same origin URI. Somehow these checks are not working properly.