Cannot clear positions in paper trading account

The position displayed seems not consistent with the backend numbers somehow as when I trying to liquidate positions (either manually from website UI or from Python SDK), the order cannot go through. The error displayed on UI is shown below. I didn’t find the same issue for the live account currently.

you might have made a order already

Thanks, Kris. Problem resolved after I clear all existing orders in Python, maybe it’s just the web UI not update in time for orders or I overlooked it.