diff --git a/src/models/actions/update/UpdateTrackScan.ts b/src/models/actions/update/UpdateTrackScan.ts
index e6e9c58..6bdc83e 100644
--- a/src/models/actions/update/UpdateTrackScan.ts
+++ b/src/models/actions/update/UpdateTrackScan.ts
@@ -1,4 +1,4 @@
-import { IsBoolean, IsInt, IsOptional } from 'class-validator';
+import { IsBoolean, IsInt, IsOptional, IsPositive } from 'class-validator';
 import { getConnection } from 'typeorm';
 import { RunnerNotFoundError } from '../../../errors/RunnerErrors';
 import { ScanStationNotFoundError } from '../../../errors/ScanStationErrors';
@@ -22,8 +22,8 @@ export abstract class UpdateTrackScan {
      * This is important to link ran distances to runners.
      */
     @IsInt()
-    @IsOptional()
-    runner?: number;
+    @IsPositive()
+    runner: number;
 
     /**
      * Is the updated scan valid (for fraud reasons).
@@ -37,8 +37,8 @@ export abstract class UpdateTrackScan {
      * This is important to link ran distances to runners.
      */
     @IsInt()
-    @IsOptional()
-    public station?: number;
+    @IsPositive()
+    public station: number;
 
     /**
      * Update a TrackScan entity based on this.
@@ -46,12 +46,8 @@ export abstract class UpdateTrackScan {
      */
     public async update(scan: TrackScan): Promise<TrackScan> {
         scan.valid = this.valid;
-        if (this.runner) {
-            scan.runner = await this.getRunner();
-        }
-        if (this.station) {
-            scan.station = await this.getStation();
-        }
+        scan.runner = await this.getRunner();
+        scan.station = await this.getStation();
         scan.track = scan.station.track;
 
         return scan;
@@ -72,7 +68,7 @@ export abstract class UpdateTrackScan {
      * Gets a runner based on the runner id provided via this.runner.
      */
     public async getStation(): Promise<ScanStation> {
-        const station = await getConnection().getRepository(ScanStation).findOne({ id: this.station });
+        const station = await getConnection().getRepository(ScanStation).findOne({ id: this.station }, { relations: ['track'] });
         if (!station) {
             throw new ScanStationNotFoundError();
         }