A few days ago (1/2 or 1/3), when I was deleting a deck, I was prompted to re-sync my cards with AnkiHub, to which I accidentally downloaded a previously synced version of my library rather than uploading the new version. As a result, I ended up losing all progress with AnKing that I had made over the past few days, as well as losing my streak.
Is there a possibility for me to regain my progress lost, or is this unfixable?
Thank you for reaching out! Our moderators have been notified and will assist you shortly. In the meantime, you can get an instant response from me simply by @ mentioning my username`. Alternatively, start a private conversation with me (see screenshot below). If you ask me a question, I will do my best to respond using only verified information found in the official AnkiHub docs and the Anki manual.
You can also find answers to common questions in our FAQ and Docs.
Anki typically makes periodic backups, automatically, of your collection at various points in time. You can likely restore from a given backup that corresponds to whichever point in time you would like to return your collection.
Keep in mind that any restore will necessary push you back to the point in time at which the backup was made. I.e. if you go back to a backup from 5 days ago that’s going to erase any review progress you’ve made in the 5 days since that backup.
This tutorial can walk you through how to restore from a backup: How to Restore From Backup
Please let me know if that answers your question, and if there’s anything else I can help with. 
Unfortunately, restoring the backup was unable to restore my progress. I’ll be content with continuing with the current sync. Thank you for the help
