Aave-V2 D/C (%) error on Matic

Aave-V2 displays a falsy  `D/C (%) ` on Matic  , doubling the value

Seems to be due to this explicit error in console : 

```
vue.common.dev.js:630 [Vue warn]: Duplicate keys detected: 'matic'. This may cause an update error.

found in

---> <Pages/aaveV2.vue> at pages/aave-v2.vue
       <Nuxt>
         <Layouts/default.vue> at layouts/default.vue
           <Root>
```