Unity collab removing work

I've been saving my work by using Collab (and also sharing it with others). When I opened my project I noticed that it was downloading, which apparently was an older version.

Now I've lost a few hours of work because my revision history is empty. I also cannot redo my work and save those changes because the collab dropdown keeps saying "Update Now! No revision available".

Anyone now how to at least make it so I can redo my work?