diff --git a/src/components/Calendar.vue b/src/components/Calendar.vue
index 24a8009..9e73fa3 100644
--- a/src/components/Calendar.vue
+++ b/src/components/Calendar.vue
@@ -4,6 +4,7 @@
   import {ref, onMounted, watch} from "vue";
   import { datePickerStore } from "@/stores/CalendarStore.ts";
   import { Calendar } from "@/models/Calendar.ts";
+  import router from "@/router";
 
   const calendar = new Calendar();
   const datePicker = datePickerStore();
@@ -25,6 +26,19 @@
     calendar.setDay(day);
     toggleSelectedDay(event.target.id,  calendar.getDate());
     highlightSelectedDay(event.target);
+    checkConsistency();
+  }
+
+  function checkConsistency(){
+
+    let selected = selectedDays.value;
+    let stored = datePicker.value;
+
+    if(selected.size != stored.length){
+      datePicker.clear();
+      selected.clear();
+      router.push('/error')
+    }
   }
 
   function toggleSelectedDay(id : string, date : Date) : void {
diff --git a/src/router/index.ts b/src/router/index.ts
index 61e4dca..22319a3 100644
--- a/src/router/index.ts
+++ b/src/router/index.ts
@@ -12,6 +12,7 @@ const router = createRouter({
     { path: '/about',  name: 'about',  component: AboutView},
     { path: '/create', name: 'create', component: CreateView},
     { path: '/join',   name: 'join',   component: JoinView},
+    { path: '/error',  name: 'error',  component: ErrorView},
     { path: '/:pathMatch(.*)*',        component: ErrorView }
   ]
 })
diff --git a/src/stores/CalendarStore.ts b/src/stores/CalendarStore.ts
index f49b3f5..64a42f6 100644
--- a/src/stores/CalendarStore.ts
+++ b/src/stores/CalendarStore.ts
@@ -5,10 +5,15 @@ export const datePickerStore = defineStore('datePicker', {
   state: () => {
     return { dates: [] as TimeStamp[] }
   },
+  getters: {
+    value: (state) : TimeStamp[] => state.dates as TimeStamp[],
+  },
   actions: {
-    update(dates : Date[]) {
+    update(dates : Date[]) : void {
       this.dates = dates.map(date => new TimeStamp(date));
-      console.log(this.dates);
+    },
+    clear() : void {
+      this.dates = [] as TimeStamp[];
     },
   },
 })