Back to singular journey for telemetry

Author: schnuerle

data-types.md

@@ -114,7 +114,7 @@ A standard point of vehicle telemetry. References to latitude and longitude impl
 | `telemetry_id`    | UUID            | Required               | ID used for uniquely-identifying a Telemetry entry |
 | `timestamp`       | [Timestamp][ts] | Required               | Date/time that event occurred. Based on GPS or GNSS clock            |
 | `trip_ids`        | UUID[]          | Required               | If telemetry occurred during a trip, the ID of the trip(s).  If not in a trip, `null`. 
-| `journey_ids`      | UUID[]            | Required               | If telemetry occurred during a trip, the ID of the journey(s).  If not in a journey, `null`.
+| `journey_id`      | UUID            | Required               | If telemetry occurred during a trip, the ID of the journey.  If not in a trip, `null`.
 | `stop_id`         | UUID            | Required if Applicable | Stop that the vehicle is currently located at. Only applicable for _docked_ Micromobility. See [Stops][stops] |
 | `location`        | [GPS][gps]      | Required               | Telemetry position data |
 | `battery_percent` | Integer         | Required if Applicable | Percent battery charge of vehicle, expressed between 0 and 100 |