I have got a new request with wrong price on. It is $0.00 but should be 129 Euros. Why is this happened? How should I react to accept this request with a right price?
$0.00 is offcourse a technical error, which must be reported to Airbnb. I looked at your listing and simulated bookings, but they all give me normal prices. So maybe it is an incident, so you can message the guest about it, ask the guest to retract the booking request and make a new one.
Otherwise the guest can try to make an inquiry , so you can sent the guest the booking yourself by "special offer".