What happens if you lose a GTC?

Good day, folks! I'm curious to know, what exactly happens if one were to lose their Good Til Cancelled (GTC) order? Do you think it would just evaporate into thin air, or is there some sort of recovery process in place? Could this potentially lead to any financial losses, and if so, how significant could they be? Moreover, are there any preventative measures one could take to avoid such a scenario in the future? I'd love to hear your thoughts on this matter.