print/templates/email/zone-included/zone-included.html

@@ -18,7 +18,7 @@
                 </tr>
             </thead>
             <tbody>
-                <tr v-for="zone in zoneCollisions">
+                <tr v-for="zone in zones" v-bind:key="zone.zoneFk">
                     <td>{{ zone.zn.name }}</td>
                     <td>{{ zone.zoneFk }}</td>
                     <td>{{ zone.z.price }}</td>

print/templates/email/zone-included/zone-included.js

@@ -8,5 +8,10 @@ module.exports = {
     },
     props: {
         zoneCollisions: {type: Array, required: true}
+    },
+    computed: {
+        zones() {
+            return JSON.parse(this.zoneCollisions);
+        }
     }
 };