Warning spam into Console breaks Page

[Vue warn]: Avoid app logic that relies on enumerating keys on a component instance. The keys will be empty in production mode to avoid performance overhead. 
  at <[id] onVnodeUnmounted=fn<onVnodeUnmounted> ref=Ref< Proxy(Object) {} > > 
  at <Anonymous key="/group/users/f35dcd65-1e65-48e8-bee4-ecf2a9428096()" vnode= {} route= {}  ... > 
  at <RouterView name=undefined route=undefined > 
  at <NuxtPage> 
  at <App key=3 > 
  at <NuxtRoot>

 mounted() {
    this.groupId = this.$route.params.id;
  },