I found a QSO in my own logs from September 2006 that I have NOT previously uploaded or entered into the database and found that if I attempt to upload it as CSV I just get
I’ve just realised that doesn’t explain why there is a limit. There was a good reason in the past but I can’t remember what it was now. The requirement can probably be dropped. If you log the QSO with exactly the same data but the wrong year, say 2021, I’ll tweak the date on it for you to 2006.