By pre-approving a booking request you give your guest 72 hours to pay and confirm a reservation before it expires. If a pre-approval is expired, you can still help a guest to guest book your fishing cabin:
Resend a payment request if you want to reactivate the booking request at the same price (go to the booking detail page and scroll to the bottom where you find the button 'Resend payment request').
Send a special offer (add discount: go to the booking detail page and scroll to the bottom where you find the button 'Add discount').
Ask the guest to send you a new booking request.