It means that the rate you're trying to send to Airbnb from myfrontdesk is out of the minimum/maximum daily rate limitation on Airbnb.
On this page, you will find more information about the most common causes and most relevant solutions for the AirBnb error '"Myallocator request sent to Airbnb via API hasn't passed validation process. Details: [Your daily price is too low/high. The minimum/maximum is ...]"'. Do you need help straight away? Visit our support page.