@Angela2609 you have some prices for next summer that are way lower than that: some days are set to around €30 ($47 Canadian). If you have the automated pricing set up, I would switch it off immediately. Maybe consider blocking your calendar until you get it sorted out. A year is a big booking window: it might be wise to start with a shorter window until you get things sorted out.
Then, go to your calendar and see what the pricing says. Change as needed. You can select a date range and make all days the same, update individual dates, or create rules.
If this guest has just sent an inquiry and not a request to book, just reply to their message and let them know pricing was incorrect. That's all you need to do to maintain your response rate.