Negative travel time to cancelled stop reports an error

[networkException]

Looking at the following SIRI

// ...
{
  "stopPointRef": {
    "value": "570001"
  },
  "order": 1,
  "extraCall": false,
  "cancellation": false,
  "aimedArrivalTime": "2026-01-09T10:06:00Z",
  "aimedDepartureTime": "2026-01-09T10:06:00Z",
  "expectedArrivalTime": "2026-01-09T10:35:40Z",
  "expectedDepartureTime": "2026-01-09T10:35:40Z"
},
{
  "stopPointRef": {
    "value": "216501"
  },
  "order": 2,
  "extraCall": false,
  "cancellation": true,
  "aimedArrivalTime": "2026-01-09T10:07:00Z",
  "aimedDepartureTime": "2026-01-09T10:07:00Z"
},
// ...

I get an error

[error][nigiri.rt.update_time] travel_time < 0: ("Oggersheim, Comeniusstaße", "570001") -> ("Wilhelm-Tell-Straße", "216501"): dep=635 - arr=607