Just opened strategy room to find previous fleet setup to use and I found that all the records except the last session were gone. Last session I was still able to see all the previous records as I did use the strategy room to find previous fleet setup as well.

I restarted the PC but it's still the same. No records before the last session.

Is there anyway to recover the data?

RIP all my event records. Also this will be a hassle researching fleet for all maps saved for a few.