console.js:288 Warning: Each child in a list should have a unique "key" prop.

Check the render method of PageLayout. See https://fb.me/react-warning-keys for more information.
in WithStyles(ForwardRef(Grid)) (created by PageLayout)
in PageLayout (created by ViewTemplateDetails)
in ViewTemplateDetails (created by Context.Consumer)
in Route (created by RenderRoute)
in Switch (created by RenderRoute)
in Suspense (created by RenderRoute)
in RenderRoute (created by App)
in IntlProvider (created by App)
in div (created by MainLayout)
in PagePermissions (created by MainLayout)
in main (created by MainLayout)
in div (created by MainLayout)
in div (created by MainLayout)
in SubscriptionsProvider (created by MainLayout)
in DatadogProvider (created by MainLayout)
in AppInsightsLogger (created by MainLayout)
in MainLayout (created by App)
in Router (created by BrowserRouter)
in BrowserRouter (created by App)
in ForwardRef (created by AuthProvider)
in AuthProvider (created by App)
in StylesProvider (created by ThemeProvider)
in ThemeProvider (created by ThemeProvider)
in ThemeProvider (created by MainProvider)
in SettingsProvider (created by MainProvider)
in MainProvider (created by App)
in App
in Provider

Commencez par localiser la méthode de rendu de PageLayout mentionnée dans l’avertissement et reproduisez le problème sur la route ViewTemplateDetails. Suivez la liste qui déclenche l’avertissement, puis vérifiez que la console est vide lorsque la route est rendue.