diff --git a/src/drawApp/graphics/TurnoutInteraction.ts b/src/drawApp/graphics/TurnoutInteraction.ts
index b1bbe32..3670ad9 100644
--- a/src/drawApp/graphics/TurnoutInteraction.ts
+++ b/src/drawApp/graphics/TurnoutInteraction.ts
@@ -316,16 +316,10 @@ export class TurnoutData extends GraphicDataBase implements ITurnoutData {
   get kilometerSystem(): KilometerSystem[] {
     return this.data.kilometerSystem.length > 0
       ? this.data.kilometerSystem
-      : [
-          new graphicData.KilometerSystem({
-            coordinateSystem: '',
-            kilometer: 0,
-          }),
-          new graphicData.KilometerSystem({
-            coordinateSystem: '',
-            kilometer: 0,
-          }),
-        ];
+      : (this.data.kilometerSystem = [
+          new graphicData.KilometerSystem(),
+          new graphicData.KilometerSystem(),
+        ]);
   }
   set kilometerSystem(value: KilometerSystem[]) {
     this.data.kilometerSystem = value.map(