diff --git a/src/Bundle/ChillCalendarBundle/Resources/public/vuejs/MyCalendarRange/App2.vue b/src/Bundle/ChillCalendarBundle/Resources/public/vuejs/MyCalendarRange/App2.vue
index e35db74ad..9b24611cf 100644
--- a/src/Bundle/ChillCalendarBundle/Resources/public/vuejs/MyCalendarRange/App2.vue
+++ b/src/Bundle/ChillCalendarBundle/Resources/public/vuejs/MyCalendarRange/App2.vue
@@ -146,7 +146,11 @@
               id="copyFromWeek"
               class="form-select"
             >
-              <option v-for="w in lastWeeks" :value="w.value" :key="w.value">
+              <option
+                v-for="w in lastWeeks"
+                :value="w.value"
+                :key="w.value || ''"
+              >
                 {{ w.text }}
               </option>
             </select>
@@ -156,7 +160,11 @@
           </div>
           <div class="col-xs-12 col-sm-3 col-md-3">
             <select v-model="copyToWeek" id="copyToWeek" class="form-select">
-              <option v-for="w in nextWeeks" :value="w.value" :key="w.value">
+              <option
+                v-for="w in nextWeeks"
+                :value="w.value"
+                :key="w.value || ''"
+              >
                 {{ w.text }}
               </option>
             </select>