modules/route/back/models/route.js

@@ -30,9 +30,11 @@ module.exports = Self => {
     });
 
     function validateDistance(err) {
+        if (this.kmEnd) {
             const routeTotalKm = this.kmEnd - this.kmStart;
             const routeMaxKm = 4000;
             if (routeTotalKm > routeMaxKm || this.kmStart > this.kmEnd)
                 err();
         }
+    }
 };