Unpriced ferry crossing detected

A quote was priced with a ferry crossing that returned £0. Add a price for this crossing in ferry configuration so future quotes include it.

• Crossing: {{ $crossingKey }}
@if ($quote)
• Quote: {{ $quote->quote_id }}
• Route: {{ $quote->from_address }} → {{ $quote->to_address }}
@endif

This is an internal operations alert (one per crossing per 24h).